31020131133331 has 8 divisors (see below), whose sum is σ = 31386218724000. Its totient is φ = 30654988286208.

The previous prime is 31020131133301. The next prime is 31020131133367. The reversal of 31020131133331 is 13333113102013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31020131133331 - 2²¹ = 31020129036179 is a prime.

It is a super-2 number, since 2×31020131133331² (a number of 28 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 = 31020131133296 and 31020131133305.

It is not an unprimeable number, because it can be changed into a prime (31020131133301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236119831 + ... + 236251168.

It is an arithmetic number, because the mean of its divisors is an integer number (3923277340500).

Almost surely, 2^{31020131133331} is an apocalyptic number.

31020131133331 is a deficient number, since it is larger than the sum of its proper divisors (366087590669).

31020131133331 is an equidigital number, since it uses as much as digits as its factorization.

31020131133331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472371773.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 31020131133331 its reverse (13333113102013), we get a palindrome (44353244235344).

The spelling of 31020131133331 in words is "thirty-one trillion, twenty billion, one hundred thirty-one million, one hundred thirty-three thousand, three hundred thirty-one".