21210221112002 has 16 divisors (see below), whose sum is σ = 34262816965440. Its totient is φ = 9789289366032.

The previous prime is 21210221111971. The next prime is 21210221112019. The reversal of 21210221112002 is 20021112201212.

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, 4585499 + ... + 7965377.

It is an arithmetic number, because the mean of its divisors is an integer number (2141426060340).

Almost surely, 2^{21210221112002} is an apocalyptic number.

21210221112002 is a deficient number, since it is larger than the sum of its proper divisors (13052595853438).

21210221112002 is a wasteful number, since it uses less digits than its factorization.

21210221112002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621257.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21210221112002 its reverse (20021112201212), we get a palindrome (41231333313214).

The spelling of 21210221112002 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-one million, one hundred twelve thousand, two".