212121112111012 has 24 divisors (see below), whose sum is σ = 399891991044672. Its totient is φ = 97871370986400.

The previous prime is 212121112110997. The next prime is 212121112111019. The reversal of 212121112111012 is 210111211121212.

It is not an unprimeable number, because it can be changed into a prime (212121112111019) 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, 639014914 + ... + 639346777.

It is an arithmetic number, because the mean of its divisors is an integer number (16662166293528).

Almost surely, 2^{212121112111012} is an apocalyptic number.

It is an amenable number.

212121112111012 is a deficient number, since it is larger than the sum of its proper divisors (187770878933660).

212121112111012 is a wasteful number, since it uses less digits than its factorization.

212121112111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278364899 (or 1278364897 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 212121112111012 its reverse (210111211121212), we get a palindrome (422232323232224).

The spelling of 212121112111012 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred twelve million, one hundred eleven thousand, twelve".