22065405121 has 4 divisors (see below), whose sum is σ = 22096527700. Its totient is φ = 22034282544.

The previous prime is 22065405113. The next prime is 22065405127. The reversal of 22065405121 is 12150456022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12150456022 = 2 ⋅6075228011.

It can be written as a sum of positive squares in 2 ways, for example, as 10193123521 + 11872281600 = 100961^2 + 108960^2 .

It is a cyclic number.

It is not a de Polignac number, because 22065405121 - 2³ = 22065405113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22065405121.

It is not an unprimeable number, because it can be changed into a prime (22065405127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15560226 + ... + 15561643.

It is an arithmetic number, because the mean of its divisors is an integer number (5524131925).

Almost surely, 2^22065405121 is an apocalyptic number.

It is an amenable number.

22065405121 is a deficient number, since it is larger than the sum of its proper divisors (31122579).

22065405121 is an equidigital number, since it uses as much as digits as its factorization.

22065405121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31122578.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 22065405121 in words is "twenty-two billion, sixty-five million, four hundred five thousand, one hundred twenty-one".