20012222100 has 72 divisors (see below), whose sum is σ = 62356043680. Its totient is φ = 4926084480.

The previous prime is 20012222077. The next prime is 20012222107. The reversal of 20012222100 is 122221002.

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 (20012222107) 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, 2561770 + ... + 2569569.

Almost surely, 2^20012222100 is an apocalyptic number.

20012222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012222100 is an abundant number, since it is smaller than the sum of its proper divisors (42343821580).

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

20012222100 is a wasteful number, since it uses less digits than its factorization.

20012222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5131369 (or 5131362 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20012222100 its reverse (122221002), we get a palindrome (20134443102).

It can be divided in two parts, 200122 and 22100, that added together give a palindrome (222222).

The spelling of 20012222100 in words is "twenty billion, twelve million, two hundred twenty-two thousand, one hundred".