20111234331100 has 72 divisors (see below), whose sum is σ = 48260951757648. Its totient is φ = 7212995596800.

The previous prime is 20111234331031. The next prime is 20111234331103. The reversal of 20111234331100 is 113343211102.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111234331103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125145319 + ... + 125305918.

It is an arithmetic number, because the mean of its divisors is an integer number (670290996634).

Almost surely, 2^{20111234331100} is an apocalyptic number.

20111234331100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111234331100 is an abundant number, since it is smaller than the sum of its proper divisors (28149717426548).

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

20111234331100 is a wasteful number, since it uses less digits than its factorization.

20111234331100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250451335 (or 250451328 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20111234331100 its reverse (113343211102), we get a palindrome (20224577542202).

The spelling of 20111234331100 in words is "twenty trillion, one hundred eleven billion, two hundred thirty-four million, three hundred thirty-one thousand, one hundred".