22999587145921 has 2 divisors, whose sum is σ = 22999587145922. Its totient is φ = 22999587145920.

The previous prime is 22999587145919. The next prime is 22999587145949. The reversal of 22999587145921 is 12954178599922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11884297864321 + 11115289281600 = 3447361^2 + 3333960^2 .

It is a cyclic number.

It is not a de Polignac number, because 22999587145921 - 2¹ = 22999587145919 is a prime.

Together with 22999587145919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22999587145961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11499793572960 + 11499793572961.

It is an arithmetic number, because the mean of its divisors is an integer number (11499793572961).

Almost surely, 2^{22999587145921} is an apocalyptic number.

It is an amenable number.

22999587145921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22999587145921 is an equidigital number, since it uses as much as digits as its factorization.

22999587145921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 293932800, while the sum is 73.

The spelling of 22999587145921 in words is "twenty-two trillion, nine hundred ninety-nine billion, five hundred eighty-seven million, one hundred forty-five thousand, nine hundred twenty-one".