21112033131 has 64 divisors (see below), whose sum is σ = 36837504000. Its totient is φ = 11944044000.

The previous prime is 21112033079. The next prime is 21112033133. The reversal of 21112033131 is 13133021112.

21112033131 is a `hidden beast` number, since 211 + 120 + 331 + 3 + 1 = 666.

It is not a de Polignac number, because 21112033131 - 2¹³ = 21112024939 is a prime.

It is a super-2 number, since 2×21112033131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21112033133) 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 63 ways as a sum of consecutive naturals, for example, 924076 + ... + 946646.

It is an arithmetic number, because the mean of its divisors is an integer number (575586000).

Almost surely, 2^21112033131 is an apocalyptic number.

21112033131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21112033131 is a deficient number, since it is larger than the sum of its proper divisors (15725470869).

21112033131 is a wasteful number, since it uses less digits than its factorization.

21112033131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22702 (or 22682 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21112033131 its reverse (13133021112), we get a palindrome (34245054243).

The spelling of 21112033131 in words is "twenty-one billion, one hundred twelve million, thirty-three thousand, one hundred thirty-one".