121312110 has 32 divisors (see below), whose sum is σ = 294039072. Its totient is φ = 32028800.

The previous prime is 121312109. The next prime is 121312141. The reversal of 121312110 is 11213121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16989 + ... + 23048.

It is an arithmetic number, because the mean of its divisors is an integer number (9188721).

Almost surely, 2^121312110 is an apocalyptic number.

121312110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121312110 is an abundant number, since it is smaller than the sum of its proper divisors (172726962).

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

121312110 is a wasteful number, since it uses less digits than its factorization.

121312110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40148.

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

The square root of 121312110 is about 11014.1776815158. The cubic root of 121312110 is about 495.0336473404.

Adding to 121312110 its reverse (11213121), we get a palindrome (132525231).

It can be divided in two parts, 12131 and 2110, that added together give a palindrome (14241).

The spelling of 121312110 in words is "one hundred twenty-one million, three hundred twelve thousand, one hundred ten".