301220212121 has 4 divisors (see below), whose sum is σ = 301415430912. Its totient is φ = 301024993332.

The previous prime is 301220212061. The next prime is 301220212141. The reversal of 301220212121 is 121212022103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 301220212121 - 2¹⁸ = 301219949977 is a prime.

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 301220212121.

It is not an unprimeable number, because it can be changed into a prime (301220212141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97607081 + ... + 97610166.

It is an arithmetic number, because the mean of its divisors is an integer number (75353857728).

Almost surely, 2^301220212121 is an apocalyptic number.

It is an amenable number.

301220212121 is a deficient number, since it is larger than the sum of its proper divisors (195218791).

301220212121 is a wasteful number, since it uses less digits than its factorization.

301220212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195218790.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 301220212121 its reverse (121212022103), we get a palindrome (422432234224).

The spelling of 301220212121 in words is "three hundred one billion, two hundred twenty million, two hundred twelve thousand, one hundred twenty-one".