120310311521 has 12 divisors (see below), whose sum is σ = 131071705344. Its totient is φ = 110301463800.

The previous prime is 120310311491. The next prime is 120310311523. The reversal of 120310311521 is 125113013021.

It is a de Polignac number, because none of the positive numbers 2^k-120310311521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120310311493 and 120310311502.

It is not an unprimeable number, because it can be changed into a prime (120310311523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5364125 + ... + 5386506.

It is an arithmetic number, because the mean of its divisors is an integer number (10922642112).

Almost surely, 2^120310311521 is an apocalyptic number.

It is an amenable number.

120310311521 is a deficient number, since it is larger than the sum of its proper divisors (10761393823).

120310311521 is a wasteful number, since it uses less digits than its factorization.

120310311521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10750700 (or 10750681 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 120310311521 its reverse (125113013021), we get a palindrome (245423324542).

The spelling of 120310311521 in words is "one hundred twenty billion, three hundred ten million, three hundred eleven thousand, five hundred twenty-one".