21201022010210 has 128 divisors (see below), whose sum is σ = 46280546726400. Its totient is φ = 6837806868480.

The previous prime is 21201022010171. The next prime is 21201022010279. The reversal of 21201022010210 is 1201022010212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 61334624 + ... + 61679316.

It is an arithmetic number, because the mean of its divisors is an integer number (361566771300).

Almost surely, 2^{21201022010210} is an apocalyptic number.

21201022010210 is an abundant number, since it is smaller than the sum of its proper divisors (25079524716190).

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

21201022010210 is a wasteful number, since it uses less digits than its factorization.

21201022010210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345516.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21201022010210 its reverse (1201022010212), we get a palindrome (22402044020422).

The spelling of 21201022010210 in words is "twenty-one trillion, two hundred one billion, twenty-two million, ten thousand, two hundred ten".