212331230121 has 4 divisors (see below), whose sum is σ = 283108306832. Its totient is φ = 141554153412.

The previous prime is 212331230093. The next prime is 212331230141. The reversal of 212331230121 is 121032133212.

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 212331230121 - 2⁹ = 212331229609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212331230141) 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, 35388538351 + ... + 35388538356.

It is an arithmetic number, because the mean of its divisors is an integer number (70777076708).

Almost surely, 2^212331230121 is an apocalyptic number.

It is an amenable number.

212331230121 is a deficient number, since it is larger than the sum of its proper divisors (70777076711).

212331230121 is an equidigital number, since it uses as much as digits as its factorization.

212331230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70777076710.

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

Adding to 212331230121 its reverse (121032133212), we get a palindrome (333363363333).

The spelling of 212331230121 in words is "two hundred twelve billion, three hundred thirty-one million, two hundred thirty thousand, one hundred twenty-one".