102121686450071 has 2 divisors, whose sum is σ = 102121686450072. Its totient is φ = 102121686450070.

The previous prime is 102121686450067. The next prime is 102121686450073. The reversal of 102121686450071 is 170054686121201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102121686450071 - 2² = 102121686450067 is a prime.

It is a super-2 number, since 2×102121686450071² (a number of 29 digits) contains 22 as substring.

Together with 102121686450073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102121686450073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060843225035 + 51060843225036.

It is an arithmetic number, because the mean of its divisors is an integer number (51060843225036).

Almost surely, 2^{102121686450071} is an apocalyptic number.

102121686450071 is a deficient number, since it is larger than the sum of its proper divisors (1).

102121686450071 is an equidigital number, since it uses as much as digits as its factorization.

102121686450071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 102121686450071 in words is "one hundred two trillion, one hundred twenty-one billion, six hundred eighty-six million, four hundred fifty thousand, seventy-one".