21025023453321 has 32 divisors (see below), whose sum is σ = 28755359625216. Its totient is φ = 13656601728000.

The previous prime is 21025023453299. The next prime is 21025023453323. The reversal of 21025023453321 is 12335432052012.

It is not a de Polignac number, because 21025023453321 - 2²² = 21025019259017 is a prime.

It is a super-2 number, since 2×21025023453321² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21025023453323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 676443501 + ... + 676474581.

It is an arithmetic number, because the mean of its divisors is an integer number (898604988288).

Almost surely, 2^{21025023453321} is an apocalyptic number.

It is an amenable number.

21025023453321 is a deficient number, since it is larger than the sum of its proper divisors (7730336171895).

21025023453321 is a wasteful number, since it uses less digits than its factorization.

21025023453321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38273.

The product of its (nonzero) digits is 43200, while the sum is 33.

The spelling of 21025023453321 in words is "twenty-one trillion, twenty-five billion, twenty-three million, four hundred fifty-three thousand, three hundred twenty-one".