121331120 has 20 divisors (see below), whose sum is σ = 282095040. Its totient is φ = 48532416.

The previous prime is 121331113. The next prime is 121331153. The reversal of 121331120 is 21133121.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 121331095 and 121331104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758240 + ... + 758399.

It is an arithmetic number, because the mean of its divisors is an integer number (14104752).

Almost surely, 2^121331120 is an apocalyptic number.

121331120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121331120 is an abundant number, since it is smaller than the sum of its proper divisors (160763920).

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

121331120 is a wasteful number, since it uses less digits than its factorization.

121331120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516652 (or 1516646 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 121331120 is about 11015.0406263436. The cubic root of 121331120 is about 495.0595037810.

Adding to 121331120 its reverse (21133121), we get a palindrome (142464241).

The spelling of 121331120 in words is "one hundred twenty-one million, three hundred thirty-one thousand, one hundred twenty".