102021210971 has 2 divisors, whose sum is σ = 102021210972. Its totient is φ = 102021210970.

The previous prime is 102021210959. The next prime is 102021211001. The reversal of 102021210971 is 179012120201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102021210971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102021210971.

It is not a weakly prime, because it can be changed into another prime (102021210931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010605485 + 51010605486.

It is an arithmetic number, because the mean of its divisors is an integer number (51010605486).

Almost surely, 2^102021210971 is an apocalyptic number.

102021210971 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021210971 is an equidigital number, since it uses as much as digits as its factorization.

102021210971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 102021210971 in words is "one hundred two billion, twenty-one million, two hundred ten thousand, nine hundred seventy-one".