21321401192 has 64 divisors (see below), whose sum is σ = 49221715200. Its totient is φ = 8431672320.

The previous prime is 21321401191. The next prime is 21321401221. The reversal of 21321401192 is 29110412312.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (21321401191) 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 15 ways as a sum of consecutive naturals, for example, 3286592 + ... + 3293072.

It is an arithmetic number, because the mean of its divisors is an integer number (769089300).

Almost surely, 2^21321401192 is an apocalyptic number.

It is an amenable number.

21321401192 is an abundant number, since it is smaller than the sum of its proper divisors (27900314008).

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

21321401192 is a wasteful number, since it uses less digits than its factorization.

21321401192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11026 (or 11022 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 21321401192 in words is "twenty-one billion, three hundred twenty-one million, four hundred one thousand, one hundred ninety-two".