121321130120 has 32 divisors (see below), whose sum is σ = 273639994200. Its totient is φ = 48409794048.

The previous prime is 121321130093. The next prime is 121321130123. The reversal of 121321130120 is 21031123121.

It can be written as a sum of positive squares in 4 ways, for example, as 120227240644 + 1093889476 = 346738^2 + 33074^2 .

It is a super-2 number, since 2×121321130120² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121321130123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3691499 + ... + 3724218.

Almost surely, 2^121321130120 is an apocalyptic number.

121321130120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121321130120 is an abundant number, since it is smaller than the sum of its proper divisors (152318864080).

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

121321130120 is a wasteful number, since it uses less digits than its factorization.

121321130120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7416137 (or 7416133 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121321130120 its reverse (21031123121), we get a palindrome (142352253241).

The spelling of 121321130120 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred thirty thousand, one hundred twenty".