22177012987 has 2 divisors, whose sum is σ = 22177012988. Its totient is φ = 22177012986.

The previous prime is 22177012961. The next prime is 22177012993. The reversal of 22177012987 is 78921077122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22177012987 - 2¹¹ = 22177010939 is a prime.

It is not a weakly prime, because it can be changed into another prime (22177012787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11088506493 + 11088506494.

It is an arithmetic number, because the mean of its divisors is an integer number (11088506494).

Almost surely, 2^22177012987 is an apocalyptic number.

22177012987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22177012987 is an equidigital number, since it uses as much as digits as its factorization.

22177012987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 197568, while the sum is 46.

The spelling of 22177012987 in words is "twenty-two billion, one hundred seventy-seven million, twelve thousand, nine hundred eighty-seven".