102012021971 has 2 divisors, whose sum is σ = 102012021972. Its totient is φ = 102012021970.

The previous prime is 102012021961. The next prime is 102012022003. The reversal of 102012021971 is 179120210201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102012021971 is a prime.

It is a super-2 number, since 2×102012021971² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102012021971.

It is not a weakly prime, because it can be changed into another prime (102012021961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51006010985 + 51006010986.

It is an arithmetic number, because the mean of its divisors is an integer number (51006010986).

Almost surely, 2^102012021971 is an apocalyptic number.

102012021971 is a deficient number, since it is larger than the sum of its proper divisors (1).

102012021971 is an equidigital number, since it uses as much as digits as its factorization.

102012021971 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 102012021971 in words is "one hundred two billion, twelve million, twenty-one thousand, nine hundred seventy-one".