21210220212002 has 16 divisors (see below), whose sum is σ = 31933781880000. Its totient is φ = 10565671097520.

The previous prime is 21210220211989. The next prime is 21210220212011. The reversal of 21210220212002 is 20021202201212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10264502 + ... + 12156497.

It is an arithmetic number, because the mean of its divisors is an integer number (1995861367500).

Almost surely, 2^{21210220212002} is an apocalyptic number.

21210220212002 is a deficient number, since it is larger than the sum of its proper divisors (10723561667998).

21210220212002 is a wasteful number, since it uses less digits than its factorization.

21210220212002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22422761.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21210220212002 its reverse (20021202201212), we get a palindrome (41231422413214).

The spelling of 21210220212002 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty million, two hundred twelve thousand, two".