21100111202 has 4 divisors (see below), whose sum is σ = 31650166806. Its totient is φ = 10550055600.

The previous prime is 21100111199. The next prime is 21100111261. The reversal of 21100111202 is 20211100112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12341210281 + 8758900921 = 111091^2 + 93589^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275027799 + ... + 5275027802.

Almost surely, 2^21100111202 is an apocalyptic number.

21100111202 is a deficient number, since it is larger than the sum of its proper divisors (10550055604).

21100111202 is a wasteful number, since it uses less digits than its factorization.

21100111202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550055603.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21100111202 its reverse (20211100112), we get a palindrome (41311211314).

The spelling of 21100111202 in words is "twenty-one billion, one hundred million, one hundred eleven thousand, two hundred two".