21020211220202 has 8 divisors (see below), whose sum is σ = 31555360771200. Its totient is φ = 10501757629804.

The previous prime is 21020211220189. The next prime is 21020211220219. The reversal of 21020211220202 is 20202211202012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4173987002 + ... + 4173992037.

It is an arithmetic number, because the mean of its divisors is an integer number (3944420096400).

Almost surely, 2^{21020211220202} is an apocalyptic number.

21020211220202 is a deficient number, since it is larger than the sum of its proper divisors (10535149550998).

21020211220202 is a wasteful number, since it uses less digits than its factorization.

21020211220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8347980300.

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

Adding to 21020211220202 its reverse (20202211202012), we get a palindrome (41222422422214).

The spelling of 21020211220202 in words is "twenty-one trillion, twenty billion, two hundred eleven million, two hundred twenty thousand, two hundred two".