212211120231012 has 144 divisors (see below), whose sum is σ = 625876115988480. Its totient is φ = 55587681172800.

The previous prime is 212211120230971. The next prime is 212211120231041. The reversal of 212211120231012 is 210132021112212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 212211120231012.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 306023164 + ... + 306715827.

Almost surely, 2^{212211120231012} is an apocalyptic number.

It is an amenable number.

212211120231012 is an abundant number, since it is smaller than the sum of its proper divisors (413664995757468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212211120231012 is a wasteful number, since it uses less digits than its factorization.

212211120231012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612739062 (or 612739053 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 212211120231012 its reverse (210132021112212), we get a palindrome (422343141343224).

The spelling of 212211120231012 in words is "two hundred twelve trillion, two hundred eleven billion, one hundred twenty million, two hundred thirty-one thousand, twelve".