20100012100 has 36 divisors (see below), whose sum is σ = 49848031744. Its totient is φ = 6891432480.

The previous prime is 20100012073. The next prime is 20100012103. The reversal of 20100012100 is 121000102.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is not an unprimeable number, because it can be changed into a prime (20100012103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14356452 + ... + 14357851.

Almost surely, 2^20100012100 is an apocalyptic number.

20100012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100012100 is an abundant number, since it is smaller than the sum of its proper divisors (29748019644).

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

20100012100 is a wasteful number, since it uses less digits than its factorization.

20100012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28714324 (or 28714317 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20100012100 its reverse (121000102), we get a palindrome (20221012202).

The spelling of 20100012100 in words is "twenty billion, one hundred million, twelve thousand, one hundred".