21102311112 has 32 divisors (see below), whose sum is σ = 52776278880. Its totient is φ = 7031370240.

The previous prime is 21102311099. The next prime is 21102311119. The reversal of 21102311112 is 21111320112.

It is a junction number, because it is equal to n+sod(n) for n = 21102311091 and 21102311100.

It is not an unprimeable number, because it can be changed into a prime (21102311119) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 107314 + ... + 231777.

It is an arithmetic number, because the mean of its divisors is an integer number (1649258715).

Almost surely, 2^21102311112 is an apocalyptic number.

It is an amenable number.

21102311112 is an abundant number, since it is smaller than the sum of its proper divisors (31673967768).

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

21102311112 is a wasteful number, since it uses less digits than its factorization.

21102311112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341693 (or 341689 counting only the distinct ones).

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

Adding to 21102311112 its reverse (21111320112), we get a palindrome (42213631224).

The spelling of 21102311112 in words is "twenty-one billion, one hundred two million, three hundred eleven thousand, one hundred twelve".