21201002221002 has 64 divisors (see below), whose sum is σ = 47260269434880. Its totient is φ = 6301084075776.

The previous prime is 21201002220967. The next prime is 21201002221031. The reversal of 21201002221002 is 20012220010212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111508623 + ... + 111698589.

It is an arithmetic number, because the mean of its divisors is an integer number (738441709920).

Almost surely, 2^{21201002221002} is an apocalyptic number.

21201002221002 is an abundant number, since it is smaller than the sum of its proper divisors (26059267213878).

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

21201002221002 is a wasteful number, since it uses less digits than its factorization.

21201002221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247595.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21201002221002 its reverse (20012220010212), we get a palindrome (41213222231214).

The spelling of 21201002221002 in words is "twenty-one trillion, two hundred one billion, two million, two hundred twenty-one thousand, two".