20120112122100 has 36 divisors (see below), whose sum is σ = 58214191074144. Its totient is φ = 5365363232480.

The previous prime is 20120112121969. The next prime is 20120112122119. The reversal of 20120112122100 is 122121102102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20120112122100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33533519904 + ... + 33533520503.

Almost surely, 2^{20120112122100} is an apocalyptic number.

20120112122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120112122100 is an abundant number, since it is smaller than the sum of its proper divisors (38094078952044).

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

20120112122100 is a wasteful number, since it uses less digits than its factorization.

20120112122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67067040424 (or 67067040417 counting only the distinct ones).

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

Adding to 20120112122100 its reverse (122121102102), we get a palindrome (20242233224202).

The spelling of 20120112122100 in words is "twenty trillion, one hundred twenty billion, one hundred twelve million, one hundred twenty-two thousand, one hundred".