20100122012112 has 20 divisors (see below), whose sum is σ = 51925315198080. Its totient is φ = 6700040670688.

The previous prime is 20100122012111. The next prime is 20100122012123. The reversal of 20100122012112 is 21121022100102.

It is a junction number, because it is equal to n+sod(n) for n = 20100122012091 and 20100122012100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100122012111) 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, 209376270912 + ... + 209376271007.

It is an arithmetic number, because the mean of its divisors is an integer number (2596265759904).

Almost surely, 2^{20100122012112} is an apocalyptic number.

It is an amenable number.

20100122012112 is an abundant number, since it is smaller than the sum of its proper divisors (31825193185968).

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

20100122012112 is a wasteful number, since it uses less digits than its factorization.

20100122012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418752541930 (or 418752541924 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20100122012112 its reverse (21121022100102), we get a palindrome (41221144112214).

The spelling of 20100122012112 in words is "twenty trillion, one hundred billion, one hundred twenty-two million, twelve thousand, one hundred twelve".