21211100212202 has 16 divisors (see below), whose sum is σ = 31884292434600. Its totient is φ = 10583009446080.

The previous prime is 21211100212171. The next prime is 21211100212229. The reversal of 21211100212202 is 20221200111212.

It can be written as a sum of positive squares in 4 ways, for example, as 17081267436601 + 4129832775601 = 4132949^2 + 2032199^2 .

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, 4658324 + ... + 8007632.

Almost surely, 2^{21211100212202} is an apocalyptic number.

21211100212202 is a deficient number, since it is larger than the sum of its proper divisors (10673192222398).

21211100212202 is a wasteful number, since it uses less digits than its factorization.

21211100212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3356041.

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

Adding to 21211100212202 its reverse (20221200111212), we get a palindrome (41432300323414).

The spelling of 21211100212202 in words is "twenty-one trillion, two hundred eleven billion, one hundred million, two hundred twelve thousand, two hundred two".