102021118 has 4 divisors (see below), whose sum is σ = 153031680. Its totient is φ = 51010558.

The previous prime is 102021113. The next prime is 102021133. The reversal of 102021118 is 811120201.

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

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 as a sum of consecutive naturals, namely, 25505278 + ... + 25505281.

It is an arithmetic number, because the mean of its divisors is an integer number (38257920).

Almost surely, 2^102021118 is an apocalyptic number.

102021118 is a deficient number, since it is larger than the sum of its proper divisors (51010562).

102021118 is an equidigital number, since it uses as much as digits as its factorization.

102021118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51010561.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 102021118 is about 10100.5503810436. The cubic root of 102021118 is about 467.2651157863.

Adding to 102021118 its reverse (811120201), we get a palindrome (913141319).

The spelling of 102021118 in words is "one hundred two million, twenty-one thousand, one hundred eighteen".