22177012961 has 2 divisors, whose sum is σ = 22177012962. Its totient is φ = 22177012960.

The previous prime is 22177012951. The next prime is 22177012987. The reversal of 22177012961 is 16921077122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22176868561 + 144400 = 148919^2 + 380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22177012961 is a prime.

It is not a weakly prime, because it can be changed into another prime (22177012951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11088506480 + 11088506481.

It is an arithmetic number, because the mean of its divisors is an integer number (11088506481).

Almost surely, 2^22177012961 is an apocalyptic number.

It is an amenable number.

22177012961 is a deficient number, since it is larger than the sum of its proper divisors (1).

22177012961 is an equidigital number, since it uses as much as digits as its factorization.

22177012961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 38.

The spelling of 22177012961 in words is "twenty-two billion, one hundred seventy-seven million, twelve thousand, nine hundred sixty-one".