121079520 has 144 divisors (see below), whose sum is σ = 422210880. Its totient is φ = 31583232.

The previous prime is 121079513. The next prime is 121079527. The reversal of 121079520 is 25970121.

It is an interprime number because it is at equal distance from previous prime (121079513) and next prime (121079527).

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121079527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66786 + ... + 68574.

It is an arithmetic number, because the mean of its divisors is an integer number (2932020).

Almost surely, 2^121079520 is an apocalyptic number.

121079520 is a gapful number since it is divisible by the number (10) 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 121079520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211105440).

121079520 is an abundant number, since it is smaller than the sum of its proper divisors (301131360).

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

121079520 is a wasteful number, since it uses less digits than its factorization.

121079520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857 (or 1846 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 121079520 is about 11003.6139517887. The cubic root of 121079520 is about 494.7170712517.

The spelling of 121079520 in words is "one hundred twenty-one million, seventy-nine thousand, five hundred twenty".