21110431112 has 16 divisors (see below), whose sum is σ = 39599537100. Its totient is φ = 10550554560.

The previous prime is 21110431093. The next prime is 21110431117. The reversal of 21110431112 is 21113401112.

It can be written as a sum of positive squares in 2 ways, for example, as 16329261796 + 4781169316 = 127786^2 + 69146^2 .

It is not an unprimeable number, because it can be changed into a prime (21110431117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563339 + ... + 599642.

Almost surely, 2^21110431112 is an apocalyptic number.

It is an amenable number.

21110431112 is a deficient number, since it is larger than the sum of its proper divisors (18489105988).

21110431112 is a wasteful number, since it uses less digits than its factorization.

21110431112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165256 (or 1165252 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21110431112 its reverse (21113401112), we get a palindrome (42223832224).

The spelling of 21110431112 in words is "twenty-one billion, one hundred ten million, four hundred thirty-one thousand, one hundred twelve".