21112020120212 has 12 divisors (see below), whose sum is σ = 42224040240480. Its totient is φ = 9048008622936.

The previous prime is 21112020120209. The next prime is 21112020120221. The reversal of 21112020120212 is 21202102021112.

21112020120212 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377000359262 + ... + 377000359317.

It is an arithmetic number, because the mean of its divisors is an integer number (3518670020040).

Almost surely, 2^{21112020120212} is an apocalyptic number.

It is an amenable number.

21112020120212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21112020120212 is a wasteful number, since it uses less digits than its factorization.

21112020120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754000718590 (or 754000718588 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21112020120212 its reverse (21202102021112), we get a palindrome (42314122141324).

The spelling of 21112020120212 in words is "twenty-one trillion, one hundred twelve billion, twenty million, one hundred twenty thousand, two hundred twelve".