21310110222977 has 2 divisors, whose sum is σ = 21310110222978. Its totient is φ = 21310110222976.

The previous prime is 21310110222901. The next prime is 21310110223013. The reversal of 21310110222977 is 77922201101312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20830105128001 + 480005094976 = 4564001^2 + 692824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21310110222977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21310110222977.

It is not a weakly prime, because it can be changed into another prime (21310110222277) 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, 10655055111488 + 10655055111489.

It is an arithmetic number, because the mean of its divisors is an integer number (10655055111489).

Almost surely, 2^{21310110222977} is an apocalyptic number.

It is an amenable number.

21310110222977 is a deficient number, since it is larger than the sum of its proper divisors (1).

21310110222977 is an equidigital number, since it uses as much as digits as its factorization.

21310110222977 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 21310110222977 in words is "twenty-one trillion, three hundred ten billion, one hundred ten million, two hundred twenty-two thousand, nine hundred seventy-seven".