121651392 has 56 divisors (see below), whose sum is σ = 327355200. Its totient is φ = 39859456.

The previous prime is 121651381. The next prime is 121651399. The reversal of 121651392 is 293156121.

It is a super-2 number, since 2×121651392² = 29598122351075328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121651399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5959 + ... + 16697.

Almost surely, 2^121651392 is an apocalyptic number.

121651392 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 121651392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163677600).

121651392 is an abundant number, since it is smaller than the sum of its proper divisors (205703808).

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

121651392 is a wasteful number, since it uses less digits than its factorization.

121651392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10813 (or 10803 counting only the distinct ones).

The product of its digits is 3240, while the sum is 30.

The square root of 121651392 is about 11029.5689852324. The cubic root of 121651392 is about 495.4947160957.

The spelling of 121651392 in words is "one hundred twenty-one million, six hundred fifty-one thousand, three hundred ninety-two".