121311130320 has 120 divisors (see below), whose sum is σ = 407489097600. Its totient is φ = 32342815488.

The previous prime is 121311130279. The next prime is 121311130387. The reversal of 121311130320 is 23031113121.

121311130320 is a `hidden beast` number, since 1 + 2 + 1 + 311 + 1 + 30 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121311130293 and 121311130302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4045141 + ... + 4075019.

It is an arithmetic number, because the mean of its divisors is an integer number (3395742480).

Almost surely, 2^121311130320 is an apocalyptic number.

121311130320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121311130320 is an abundant number, since it is smaller than the sum of its proper divisors (286177967280).

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

121311130320 is a wasteful number, since it uses less digits than its factorization.

121311130320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35537 (or 35528 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 121311130320 its reverse (23031113121), we get a palindrome (144342243441).

The spelling of 121311130320 in words is "one hundred twenty-one billion, three hundred eleven million, one hundred thirty thousand, three hundred twenty".