212102333121 has 8 divisors (see below), whose sum is σ = 323203555264. Its totient is φ = 121201333200.

The previous prime is 212102333111. The next prime is 212102333143. The reversal of 212102333121 is 121333201212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212102333121 - 2¹⁰ = 212102332097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10100111101 = 212102333121 / (2 + 1 + 2 + 1 + 0 + 2 + 3 + 3 + 3 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212102333101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5050055530 + ... + 5050055571.

It is an arithmetic number, because the mean of its divisors is an integer number (40400444408).

Almost surely, 2^212102333121 is an apocalyptic number.

212102333121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212102333121 is a deficient number, since it is larger than the sum of its proper divisors (111101222143).

212102333121 is a wasteful number, since it uses less digits than its factorization.

212102333121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100111111.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 212102333121 its reverse (121333201212), we get a palindrome (333435534333).

The spelling of 212102333121 in words is "two hundred twelve billion, one hundred two million, three hundred thirty-three thousand, one hundred twenty-one".