121911312 has 40 divisors (see below), whose sum is σ = 315542304. Its totient is φ = 40559104.

The previous prime is 121911259. The next prime is 121911319. The reversal of 121911312 is 213119121.

It is a happy number.

It is a super-2 number, since 2×121911312² = 29724735987122688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121911319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26323 + ... + 30605.

Almost surely, 2^121911312 is an apocalyptic number.

121911312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121911312 is an abundant number, since it is smaller than the sum of its proper divisors (193630992).

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

121911312 is a wasteful number, since it uses less digits than its factorization.

121911312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4887 (or 4881 counting only the distinct ones).

The product of its digits is 108, while the sum is 21.

The square root of 121911312 is about 11041.3455701740. The cubic root of 121911312 is about 495.8473559075.

The spelling of 121911312 in words is "one hundred twenty-one million, nine hundred eleven thousand, three hundred twelve".