21021012120202 has 16 divisors (see below), whose sum is σ = 33564005164800. Its totient is φ = 9845441511840.

The previous prime is 21021012120151. The next prime is 21021012120299. The reversal of 21021012120202 is 20202121012012.

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, 3107774874 + ... + 3107781637.

It is an arithmetic number, because the mean of its divisors is an integer number (2097750322800).

Almost surely, 2^{21021012120202} is an apocalyptic number.

21021012120202 is a deficient number, since it is larger than the sum of its proper divisors (12542993044598).

21021012120202 is a wasteful number, since it uses less digits than its factorization.

21021012120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215556621.

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

Adding to 21021012120202 its reverse (20202121012012), we get a palindrome (41223133132214).

The spelling of 21021012120202 in words is "twenty-one trillion, twenty-one billion, twelve million, one hundred twenty thousand, two hundred two".