221312002070977 has 2 divisors, whose sum is σ = 221312002070978. Its totient is φ = 221312002070976.

The previous prime is 221312002070953. The next prime is 221312002070989. The reversal of 221312002070977 is 779070200213122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156292227852721 + 65019774218256 = 12501689^2 + 8063484^2 .

It is a cyclic number.

It is not a de Polignac number, because 221312002070977 - 2⁷ = 221312002070849 is a prime.

It is not a weakly prime, because it can be changed into another prime (221312002070177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110656001035488 + 110656001035489.

It is an arithmetic number, because the mean of its divisors is an integer number (110656001035489).

Almost surely, 2^{221312002070977} is an apocalyptic number.

It is an amenable number.

221312002070977 is a deficient number, since it is larger than the sum of its proper divisors (1).

221312002070977 is an equidigital number, since it uses as much as digits as its factorization.

221312002070977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 43.

The spelling of 221312002070977 in words is "two hundred twenty-one trillion, three hundred twelve billion, two million, seventy thousand, nine hundred seventy-seven".