20112100122100 has 54 divisors (see below), whose sum is σ = 50768687034870. Its totient is φ = 6895577183040.

The previous prime is 20112100122097. The next prime is 20112100122113. The reversal of 20112100122100 is 122100121102.

It can be written as a sum of positive squares in 3 ways, for example, as 261493140496 + 19850606981604 = 511364^2 + 4455402^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2052250215 + ... + 2052260014.

Almost surely, 2^{20112100122100} is an apocalyptic number.

20112100122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112100122100 is an abundant number, since it is smaller than the sum of its proper divisors (30656586912770).

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

20112100122100 is a wasteful number, since it uses less digits than its factorization.

20112100122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104510257 (or 4104510243 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20112100122100 its reverse (122100121102), we get a palindrome (20234200243202).

The spelling of 20112100122100 in words is "twenty trillion, one hundred twelve billion, one hundred million, one hundred twenty-two thousand, one hundred".