102120312 has 48 divisors (see below), whose sum is σ = 296985960. Its totient is φ = 29176896.

The previous prime is 102120311. The next prime is 102120323. The reversal of 102120312 is 213021201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42243 + ... + 44594.

Almost surely, 2^102120312 is an apocalyptic number.

102120312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102120312 is an abundant number, since it is smaller than the sum of its proper divisors (194865648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102120312 is a wasteful number, since it uses less digits than its factorization.

102120312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86860 (or 86849 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 102120312 is about 10105.4595145397. The cubic root of 102120312 is about 467.4165056262.

Adding to 102120312 its reverse (213021201), we get a palindrome (315141513).

The spelling of 102120312 in words is "one hundred two million, one hundred twenty thousand, three hundred twelve".