31312330021031 has 8 divisors (see below), whose sum is σ = 33273922159440. Its totient is φ = 29364036812928.

The previous prime is 31312330020953. The next prime is 31312330021067. The reversal of 31312330021031 is 13012003321313.

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 31312330021031 - 2¹⁸ = 31312329758887 is a prime.

It is a super-2 number, since 2×31312330021031² (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 = 31312330020988 and 31312330021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312330011031) 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, 3324727721 + ... + 3324737138.

It is an arithmetic number, because the mean of its divisors is an integer number (4159240269930).

Almost surely, 2^{31312330021031} is an apocalyptic number.

31312330021031 is a deficient number, since it is larger than the sum of its proper divisors (1961592138409).

31312330021031 is a wasteful number, since it uses less digits than its factorization.

31312330021031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6649465153.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31312330021031 its reverse (13012003321313), we get a palindrome (44324333342344).

The spelling of 31312330021031 in words is "thirty-one trillion, three hundred twelve billion, three hundred thirty million, twenty-one thousand, thirty-one".