21210021122002 has 32 divisors (see below), whose sum is σ = 34571185758720. Its totient is φ = 9722374220160.

The previous prime is 21210021121997. The next prime is 21210021122047. The reversal of 21210021122002 is 20022112001212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30464008 + ... + 31152460.

It is an arithmetic number, because the mean of its divisors is an integer number (1080349554960).

Almost surely, 2^{21210021122002} is an apocalyptic number.

21210021122002 is a deficient number, since it is larger than the sum of its proper divisors (13361164636718).

21210021122002 is a wasteful number, since it uses less digits than its factorization.

21210021122002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714658.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21210021122002 its reverse (20022112001212), we get a palindrome (41232133123214).

The spelling of 21210021122002 in words is "twenty-one trillion, two hundred ten billion, twenty-one million, one hundred twenty-two thousand, two".