20120212100 has 36 divisors (see below), whose sum is σ = 45069282048. Its totient is φ = 7788468000.

The previous prime is 20120212097. The next prime is 20120212117. The reversal of 20120212100 is 121202102.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3242096 + ... + 3248295.

Almost surely, 2^20120212100 is an apocalyptic number.

20120212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120212100 is an abundant number, since it is smaller than the sum of its proper divisors (24949069948).

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

20120212100 is a wasteful number, since it uses less digits than its factorization.

20120212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6490436 (or 6490429 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20120212100 its reverse (121202102), we get a palindrome (20241414202).

The spelling of 20120212100 in words is "twenty billion, one hundred twenty million, two hundred twelve thousand, one hundred".