102021117 has 8 divisors (see below), whose sum is σ = 148394400. Its totient is φ = 61830960.

The previous prime is 102021113. The next prime is 102021133. The reversal of 102021117 is 711120201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102021117 - 2² = 102021113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102021096 and 102021105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1545742 + ... + 1545807.

It is an arithmetic number, because the mean of its divisors is an integer number (18549300).

Almost surely, 2^102021117 is an apocalyptic number.

It is an amenable number.

102021117 is a deficient number, since it is larger than the sum of its proper divisors (46373283).

102021117 is a wasteful number, since it uses less digits than its factorization.

102021117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3091563.

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 102021117 is about 10100.5503315413. The cubic root of 102021117 is about 467.2651142596.

Adding to 102021117 its reverse (711120201), we get a palindrome (813141318).

The spelling of 102021117 in words is "one hundred two million, twenty-one thousand, one hundred seventeen".