21021211102 has 16 divisors (see below), whose sum is σ = 31586520240. Its totient is φ = 10492388032.

The previous prime is 21021211061. The next prime is 21021211153. The reversal of 21021211102 is 20111212012.

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, 3769188 + ... + 3774760.

It is an arithmetic number, because the mean of its divisors is an integer number (1974157515).

Almost surely, 2^21021211102 is an apocalyptic number.

21021211102 is a deficient number, since it is larger than the sum of its proper divisors (10565309138).

21021211102 is a wasteful number, since it uses less digits than its factorization.

21021211102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8507.

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

Adding to 21021211102 its reverse (20111212012), we get a palindrome (41132423114).

The spelling of 21021211102 in words is "twenty-one billion, twenty-one million, two hundred eleven thousand, one hundred two".