102112099935421 has 2 divisors, whose sum is σ = 102112099935422. Its totient is φ = 102112099935420.

The previous prime is 102112099935281. The next prime is 102112099935481. The reversal of 102112099935421 is 124539990211201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75281409308196 + 26830690627225 = 8676486^2 + 5179835^2 .

It is a cyclic number.

It is not a de Polignac number, because 102112099935421 - 2²¹ = 102112097838269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102112099935481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51056049967710 + 51056049967711.

It is an arithmetic number, because the mean of its divisors is an integer number (51056049967711).

Almost surely, 2^{102112099935421} is an apocalyptic number.

It is an amenable number.

102112099935421 is a deficient number, since it is larger than the sum of its proper divisors (1).

102112099935421 is an equidigital number, since it uses as much as digits as its factorization.

102112099935421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 49.

The spelling of 102112099935421 in words is "one hundred two trillion, one hundred twelve billion, ninety-nine million, nine hundred thirty-five thousand, four hundred twenty-one".