302012203121 has 4 divisors (see below), whose sum is σ = 319777626852. Its totient is φ = 284246779392.

The previous prime is 302012203117. The next prime is 302012203127. The reversal of 302012203121 is 121302210203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121302210203 = 61 ⋅1988560823.

It can be written as a sum of positive squares in 2 ways, for example, as 246651289600 + 55360913521 = 496640^2 + 235289^2 .

It is a cyclic number.

It is not a de Polignac number, because 302012203121 - 2² = 302012203117 is a prime.

It is a super-2 number, since 2×302012203121² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 17765423713 = 302012203121 / (3 + 0 + 2 + 0 + 1 + 2 + 2 + 0 + 3 + 1 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 302012203121.

It is not an unprimeable number, because it can be changed into a prime (302012203127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8882711840 + ... + 8882711873.

It is an arithmetic number, because the mean of its divisors is an integer number (79944406713).

Almost surely, 2^302012203121 is an apocalyptic number.

It is an amenable number.

302012203121 is a deficient number, since it is larger than the sum of its proper divisors (17765423731).

302012203121 is a wasteful number, since it uses less digits than its factorization.

302012203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17765423730.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 302012203121 its reverse (121302210203), we get a palindrome (423314413324).

It can be divided in two parts, 30201 and 2203121, that added together give a palindrome (2233322).

The spelling of 302012203121 in words is "three hundred two billion, twelve million, two hundred three thousand, one hundred twenty-one".