22212108977 has 2 divisors, whose sum is σ = 22212108978. Its totient is φ = 22212108976.

The previous prime is 22212108967. The next prime is 22212108991. The reversal of 22212108977 is 77980121222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15237186721 + 6974922256 = 123439^2 + 83516^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212108977 - 2¹² = 22212104881 is a prime.

It is a super-2 number, since 2×22212108977² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22212108917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106054488 + 11106054489.

It is an arithmetic number, because the mean of its divisors is an integer number (11106054489).

Almost surely, 2^22212108977 is an apocalyptic number.

It is an amenable number.

22212108977 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212108977 is an equidigital number, since it uses as much as digits as its factorization.

22212108977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 41.

The spelling of 22212108977 in words is "twenty-two billion, two hundred twelve million, one hundred eight thousand, nine hundred seventy-seven".