21211010219900 has 36 divisors (see below), whose sum is σ = 46054330172760. Its totient is φ = 8479530724800.

The previous prime is 21211010219887. The next prime is 21211010219923. The reversal of 21211010219900 is 991201011212.

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, 60742070 + ... + 61090269.

Almost surely, 2^{21211010219900} is an apocalyptic number.

21211010219900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21211010219900 is an abundant number, since it is smaller than the sum of its proper divisors (24843319952860).

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

21211010219900 is a wasteful number, since it uses less digits than its factorization.

21211010219900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121834094 (or 121834087 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 21211010219900 in words is "twenty-one trillion, two hundred eleven billion, ten million, two hundred nineteen thousand, nine hundred".