10001221212100 has 72 divisors (see below), whose sum is σ = 22769993904896. Its totient is φ = 3807974160000.

The previous prime is 10001221212053. The next prime is 10001221212133. The reversal of 10001221212100 is 121212210001.

10001221212100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26255166 + ... + 26633365.

Almost surely, 2^{10001221212100} is an apocalyptic number.

10001221212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10001221212100 is an abundant number, since it is smaller than the sum of its proper divisors (12768772692796).

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

10001221212100 is a wasteful number, since it uses less digits than its factorization.

10001221212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52888637 (or 52888630 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10001221212100 its reverse (121212210001), we get a palindrome (10122433422101).

The spelling of 10001221212100 in words is "ten trillion, one billion, two hundred twenty-one million, two hundred twelve thousand, one hundred".