102160021 has 4 divisors (see below), whose sum is σ = 108169452. Its totient is φ = 96150592.

The previous prime is 102160007. The next prime is 102160027. The reversal of 102160021 is 120061201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74218225 + 27941796 = 8615^2 + 5286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102160021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102159983 and 102160010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102160027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3004690 + ... + 3004723.

It is an arithmetic number, because the mean of its divisors is an integer number (27042363).

Almost surely, 2^102160021 is an apocalyptic number.

It is an amenable number.

102160021 is a deficient number, since it is larger than the sum of its proper divisors (6009431).

102160021 is an equidigital number, since it uses as much as digits as its factorization.

102160021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6009430.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 102160021 is about 10107.4240536350. The cubic root of 102160021 is about 467.4770820073.

The spelling of 102160021 in words is "one hundred two million, one hundred sixty thousand, twenty-one".