21112311102 has 16 divisors (see below), whose sum is σ = 42733353600. Its totient is φ = 6952648472.

The previous prime is 21112311089. The next prime is 21112311137. The reversal of 21112311102 is 20111321112.

It is a super-3 number, since 3×21112311102³ (a number of 32 digits) contains 333 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, 21196602 + ... + 21197597.

It is an arithmetic number, because the mean of its divisors is an integer number (2670834600).

Almost surely, 2^21112311102 is an apocalyptic number.

21112311102 is an abundant number, since it is smaller than the sum of its proper divisors (21621042498).

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

21112311102 is a wasteful number, since it uses less digits than its factorization.

21112311102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42394287.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21112311102 its reverse (20111321112), we get a palindrome (41223632214).

The spelling of 21112311102 in words is "twenty-one billion, one hundred twelve million, three hundred eleven thousand, one hundred two".