20012202100 has 54 divisors (see below), whose sum is σ = 47733265622. Its totient is φ = 7277160000.

The previous prime is 20012202047. The next prime is 20012202113. The reversal of 20012202100 is 120221002.

It can be written as a sum of positive squares in 3 ways, for example, as 978688656 + 19033513444 = 31284^2 + 137962^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 814851 + ... + 839050.

Almost surely, 2^20012202100 is an apocalyptic number.

20012202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012202100 is an abundant number, since it is smaller than the sum of its proper divisors (27721063522).

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

20012202100 is a wasteful number, since it uses less digits than its factorization.

20012202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653937 (or 1653919 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20012202100 its reverse (120221002), we get a palindrome (20132423102).

The spelling of 20012202100 in words is "twenty billion, twelve million, two hundred two thousand, one hundred".