121656012 has 48 divisors (see below), whose sum is σ = 316391040. Its totient is φ = 36156672.

The previous prime is 121656001. The next prime is 121656023. The reversal of 121656012 is 210656121.

It is an interprime number because it is at equal distance from previous prime (121656001) and next prime (121656023).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11818 + ... + 19569.

It is an arithmetic number, because the mean of its divisors is an integer number (6591480).

Almost surely, 2^121656012 is an apocalyptic number.

121656012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121656012 is an abundant number, since it is smaller than the sum of its proper divisors (194735028).

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

121656012 is a wasteful number, since it uses less digits than its factorization.

121656012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31430 (or 31428 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 121656012 is about 11029.7784202585. The cubic root of 121656012 is about 495.5009885451.

The spelling of 121656012 in words is "one hundred twenty-one million, six hundred fifty-six thousand, twelve".