21321201295 has 12 divisors (see below), whose sum is σ = 25973040744. Its totient is φ = 16802361840.

The previous prime is 21321201289. The next prime is 21321201299. The reversal of 21321201295 is 59210212312.

It is not a de Polignac number, because 21321201295 - 2⁹ = 21321200783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321201299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 452521 + ... + 497410.

It is an arithmetic number, because the mean of its divisors is an integer number (2164420062).

Almost surely, 2^21321201295 is an apocalyptic number.

21321201295 is a deficient number, since it is larger than the sum of its proper divisors (4651839449).

21321201295 is an frugal number, since it uses more digits than its factorization.

21321201295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950070 (or 950003 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 21321201295 in words is "twenty-one billion, three hundred twenty-one million, two hundred one thousand, two hundred ninety-five".