20113210100 has 36 divisors (see below), whose sum is σ = 44710203468. Its totient is φ = 7849056000.

The previous prime is 20113210097. The next prime is 20113210123. The reversal of 20113210100 is 101231102.

It can be written as a sum of positive squares in 6 ways, for example, as 653518096 + 19459692004 = 25564^2 + 139498^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2448731 + ... + 2456930.

Almost surely, 2^20113210100 is an apocalyptic number.

20113210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20113210100 is an abundant number, since it is smaller than the sum of its proper divisors (24596993368).

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

20113210100 is a wasteful number, since it uses less digits than its factorization.

20113210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4905716 (or 4905709 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20113210100 its reverse (101231102), we get a palindrome (20214441202).

The spelling of 20113210100 in words is "twenty billion, one hundred thirteen million, two hundred ten thousand, one hundred".