20112112121012 has 24 divisors (see below), whose sum is σ = 36118263031200. Its totient is φ = 9795338426016.

The previous prime is 20112112120993. The next prime is 20112112121029. The reversal of 20112112121012 is 21012121121102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341223962 + ... + 341282897.

It is an arithmetic number, because the mean of its divisors is an integer number (1504927626300).

Almost surely, 2^{20112112121012} is an apocalyptic number.

It is an amenable number.

20112112121012 is a deficient number, since it is larger than the sum of its proper divisors (16006150910188).

20112112121012 is a wasteful number, since it uses less digits than its factorization.

20112112121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682507055 (or 682507053 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20112112121012 its reverse (21012121121102), we get a palindrome (41124233242114).

The spelling of 20112112121012 in words is "twenty trillion, one hundred twelve billion, one hundred twelve million, one hundred twenty-one thousand, twelve".