212333120121 has 4 divisors (see below), whose sum is σ = 283110826832. Its totient is φ = 141555413412.

The previous prime is 212333120117. The next prime is 212333120143. The reversal of 212333120121 is 121021333212.

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 not a de Polignac number, because 212333120121 - 2² = 212333120117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212333120161) 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, 35388853351 + ... + 35388853356.

It is an arithmetic number, because the mean of its divisors is an integer number (70777706708).

Almost surely, 2^212333120121 is an apocalyptic number.

It is an amenable number.

212333120121 is a deficient number, since it is larger than the sum of its proper divisors (70777706711).

212333120121 is an equidigital number, since it uses as much as digits as its factorization.

212333120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70777706710.

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

Adding to 212333120121 its reverse (121021333212), we get a palindrome (333354453333).

The spelling of 212333120121 in words is "two hundred twelve billion, three hundred thirty-three million, one hundred twenty thousand, one hundred twenty-one".