102021165 has 48 divisors (see below), whose sum is σ = 197121600. Its totient is φ = 48508416.

The previous prime is 102021149. The next prime is 102021197. The reversal of 102021165 is 561120201.

It is not a de Polignac number, because 102021165 - 2⁴ = 102021149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11026 + ... + 18044.

It is an arithmetic number, because the mean of its divisors is an integer number (4106700).

Almost surely, 2^102021165 is an apocalyptic number.

102021165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102021165 is a deficient number, since it is larger than the sum of its proper divisors (95100435).

102021165 is a wasteful number, since it uses less digits than its factorization.

102021165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7066 (or 7063 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 102021165 is about 10100.5527076492. The cubic root of 102021165 is about 467.2651875409.

Adding to 102021165 its reverse (561120201), we get a palindrome (663141366).

The spelling of 102021165 in words is "one hundred two million, twenty-one thousand, one hundred sixty-five".