21112021102 has 16 divisors (see below), whose sum is σ = 31717770192. Its totient is φ = 10539446400.

The previous prime is 21112021087. The next prime is 21112021111. The reversal of 21112021102 is 20112021112.

It is a super-2 number, since 2×21112021102² (a number of 21 digits) contains 22 as substring.

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, 4640793 + ... + 4645339.

It is an arithmetic number, because the mean of its divisors is an integer number (1982360637).

Almost surely, 2^21112021102 is an apocalyptic number.

21112021102 is a deficient number, since it is larger than the sum of its proper divisors (10605749090).

21112021102 is a wasteful number, since it uses less digits than its factorization.

21112021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7683.

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

Adding to 21112021102 its reverse (20112021112), we get a palindrome (41224042214).

The spelling of 21112021102 in words is "twenty-one billion, one hundred twelve million, twenty-one thousand, one hundred two".