21210200021002 has 16 divisors (see below), whose sum is σ = 31935613723200. Its totient is φ = 10565044031520.

The previous prime is 21210200020993. The next prime is 21210200021011. The reversal of 21210200021002 is 20012000201212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21210200020993) and next prime (21210200021011).

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, 11272227 + ... + 13018582.

It is an arithmetic number, because the mean of its divisors is an integer number (1995975857700).

Almost surely, 2^{21210200021002} is an apocalyptic number.

21210200021002 is a deficient number, since it is larger than the sum of its proper divisors (10725413702198).

21210200021002 is a wasteful number, since it uses less digits than its factorization.

21210200021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24292461.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21210200021002 its reverse (20012000201212), we get a palindrome (41222200222214).

The spelling of 21210200021002 in words is "twenty-one trillion, two hundred ten billion, two hundred million, twenty-one thousand, two".