21311201032 has 16 divisors (see below), whose sum is σ = 43591093200. Its totient is φ = 9686909520.

The previous prime is 21311200997. The next prime is 21311201047. The reversal of 21311201032 is 23010211312.

It is a junction number, because it is equal to n+sod(n) for n = 21311200997 and 21311201015.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 121086282 + ... + 121086457.

It is an arithmetic number, because the mean of its divisors is an integer number (2724443325).

Almost surely, 2^21311201032 is an apocalyptic number.

21311201032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21311201032 is an abundant number, since it is smaller than the sum of its proper divisors (22279892168).

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

21311201032 is a wasteful number, since it uses less digits than its factorization.

21311201032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242172756 (or 242172752 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21311201032 its reverse (23010211312), we get a palindrome (44321412344).

The spelling of 21311201032 in words is "twenty-one billion, three hundred eleven million, two hundred one thousand, thirty-two".