121080312 has 128 divisors (see below), whose sum is σ = 358176000. Its totient is φ = 37791360.

The previous prime is 121080277. The next prime is 121080313. The reversal of 121080312 is 213080121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121080313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 668862 + ... + 669042.

It is an arithmetic number, because the mean of its divisors is an integer number (2798250).

Almost surely, 2^121080312 is an apocalyptic number.

121080312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121080312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179088000).

121080312 is an abundant number, since it is smaller than the sum of its proper divisors (237095688).

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

121080312 is a wasteful number, since it uses less digits than its factorization.

121080312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 121080312 is about 11003.6499399063. The cubic root of 121080312 is about 494.7181499232.

The spelling of 121080312 in words is "one hundred twenty-one million, eighty thousand, three hundred twelve".