120311231331 has 4 divisors (see below), whose sum is σ = 160414975112. Its totient is φ = 80207487552.

The previous prime is 120311231297. The next prime is 120311231347. The reversal of 120311231331 is 133132113021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 120311231331 - 2²⁷ = 120177013603 is a prime.

It is a super-2 number, since 2×120311231331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120311231298 and 120311231307.

It is not an unprimeable number, because it can be changed into a prime (120311231371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20051871886 + ... + 20051871891.

It is an arithmetic number, because the mean of its divisors is an integer number (40103743778).

Almost surely, 2^120311231331 is an apocalyptic number.

120311231331 is a deficient number, since it is larger than the sum of its proper divisors (40103743781).

120311231331 is an equidigital number, since it uses as much as digits as its factorization.

120311231331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40103743780.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 120311231331 its reverse (133132113021), we get a palindrome (253443344352).

The spelling of 120311231331 in words is "one hundred twenty billion, three hundred eleven million, two hundred thirty-one thousand, three hundred thirty-one".