210021210100100 has 108 divisors (see below), whose sum is σ = 530158673673216. Its totient is φ = 72006574812480.

The previous prime is 210021210100043. The next prime is 210021210100129. The reversal of 210021210100100 is 1001012120012.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 947779517 + ... + 948001083.

Almost surely, 2^{210021210100100} is an apocalyptic number.

210021210100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210021210100100 is an abundant number, since it is smaller than the sum of its proper divisors (320137463573116).

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

210021210100100 is a wasteful number, since it uses less digits than its factorization.

210021210100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415042 (or 415028 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210021210100100 its reverse (1001012120012), we get a palindrome (211022222220112).

The spelling of 210021210100100 in words is "two hundred ten trillion, twenty-one billion, two hundred ten million, one hundred thousand, one hundred".