22549870121 has 2 divisors, whose sum is σ = 22549870122. Its totient is φ = 22549870120.

The previous prime is 22549870117. The next prime is 22549870157. The reversal of 22549870121 is 12107894522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22308409600 + 241460521 = 149360^2 + 15539^2 .

It is a cyclic number.

It is not a de Polignac number, because 22549870121 - 2² = 22549870117 is a prime.

It is not a weakly prime, because it can be changed into another prime (22549870171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11274935060 + 11274935061.

It is an arithmetic number, because the mean of its divisors is an integer number (11274935061).

Almost surely, 2^22549870121 is an apocalyptic number.

It is an amenable number.

22549870121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22549870121 is an equidigital number, since it uses as much as digits as its factorization.

22549870121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 22549870121 in words is "twenty-two billion, five hundred forty-nine million, eight hundred seventy thousand, one hundred twenty-one".