21221011102 has 16 divisors (see below), whose sum is σ = 32149589472. Its totient is φ = 10504539360.

The previous prime is 21221011079. The next prime is 21221011127. The reversal of 21221011102 is 20111012212.

It is a congruent 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, 843952 + ... + 868732.

It is an arithmetic number, because the mean of its divisors is an integer number (2009349342).

Almost surely, 2^21221011102 is an apocalyptic number.

21221011102 is a deficient number, since it is larger than the sum of its proper divisors (10928578370).

21221011102 is a wasteful number, since it uses less digits than its factorization.

21221011102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29043.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21221011102 its reverse (20111012212), we get a palindrome (41332023314).

The spelling of 21221011102 in words is "twenty-one billion, two hundred twenty-one million, eleven thousand, one hundred two".