21025023453299 has 2 divisors, whose sum is σ = 21025023453300. Its totient is φ = 21025023453298.

The previous prime is 21025023453197. The next prime is 21025023453323. The reversal of 21025023453299 is 99235432052012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21025023453299 - 2⁸ = 21025023453043 is a prime.

It is a super-2 number, since 2×21025023453299² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21025023456299) 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 as a sum of consecutive naturals, namely, 10512511726649 + 10512511726650.

It is an arithmetic number, because the mean of its divisors is an integer number (10512511726650).

Almost surely, 2^{21025023453299} is an apocalyptic number.

21025023453299 is a deficient number, since it is larger than the sum of its proper divisors (1).

21025023453299 is an equidigital number, since it uses as much as digits as its factorization.

21025023453299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 21025023453299 in words is "twenty-one trillion, twenty-five billion, twenty-three million, four hundred fifty-three thousand, two hundred ninety-nine".