102121871 has 2 divisors, whose sum is σ = 102121872. Its totient is φ = 102121870.

The previous prime is 102121853. The next prime is 102121879. The reversal of 102121871 is 178121201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102121871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102121879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060935 + 51060936.

It is an arithmetic number, because the mean of its divisors is an integer number (51060936).

Almost surely, 2^102121871 is an apocalyptic number.

102121871 is a deficient number, since it is larger than the sum of its proper divisors (1).

102121871 is an equidigital number, since it uses as much as digits as its factorization.

102121871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 23.

The square root of 102121871 is about 10105.5366507672. The cubic root of 102121871 is about 467.4188841887.

The spelling of 102121871 in words is "one hundred two million, one hundred twenty-one thousand, eight hundred seventy-one".