21101231102 has 32 divisors (see below), whose sum is σ = 36721090560. Its totient is φ = 8907524640.

The previous prime is 21101231087. The next prime is 21101231117. The reversal of 21101231102 is 20113210112.

It is an interprime number because it is at equal distance from previous prime (21101231087) and next prime (21101231117).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204452 + ... + 289832.

It is an arithmetic number, because the mean of its divisors is an integer number (1147534080).

Almost surely, 2^21101231102 is an apocalyptic number.

21101231102 is a deficient number, since it is larger than the sum of its proper divisors (15619859458).

21101231102 is a wasteful number, since it uses less digits than its factorization.

21101231102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85656.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21101231102 its reverse (20113210112), we get a palindrome (41214441214).

The spelling of 21101231102 in words is "twenty-one billion, one hundred one million, two hundred thirty-one thousand, one hundred two".