20122031100 has 72 divisors (see below), whose sum is σ = 58233963760. Its totient is φ = 5364564480.

The previous prime is 20122031081. The next prime is 20122031107. The reversal of 20122031100 is 113022102.

It is a super-2 number, since 2×20122031100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122031107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2411736 + ... + 2420064.

Almost surely, 2^20122031100 is an apocalyptic number.

20122031100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122031100 is an abundant number, since it is smaller than the sum of its proper divisors (38111932660).

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

20122031100 is a wasteful number, since it uses less digits than its factorization.

20122031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16399 (or 16392 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20122031100 its reverse (113022102), we get a palindrome (20235053202).

The spelling of 20122031100 in words is "twenty billion, one hundred twenty-two million, thirty-one thousand, one hundred".