21002211102 has 32 divisors (see below), whose sum is σ = 43792265088. Its totient is φ = 6708907296.

The previous prime is 21002211073. The next prime is 21002211119. The reversal of 21002211102 is 20111220012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 754288 + ... + 781635.

It is an arithmetic number, because the mean of its divisors is an integer number (1368508284).

Almost surely, 2^21002211102 is an apocalyptic number.

21002211102 is an abundant number, since it is smaller than the sum of its proper divisors (22790053986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002211102 is a wasteful number, since it uses less digits than its factorization.

21002211102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536024.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21002211102 its reverse (20111220012), we get a palindrome (41113431114).

The spelling of 21002211102 in words is "twenty-one billion, two million, two hundred eleven thousand, one hundred two".