31021310421133 has 12 divisors (see below), whose sum is σ = 32965100806932. Its totient is φ = 29091123605760.

The previous prime is 31021310421071. The next prime is 31021310421149. The reversal of 31021310421133 is 33112401312013.

It can be written as a sum of positive squares in 6 ways, for example, as 2203449297604 + 28817861123529 = 1484402^2 + 5368227^2 .

It is not a de Polignac number, because 31021310421133 - 2⁹ = 31021310420621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31021310421098 and 31021310421107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021310421173) 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, 10586698 + ... + 13195483.

It is an arithmetic number, because the mean of its divisors is an integer number (2747091733911).

Almost surely, 2^{31021310421133} is an apocalyptic number.

It is an amenable number.

31021310421133 is a deficient number, since it is larger than the sum of its proper divisors (1943790385799).

31021310421133 is an equidigital number, since it uses as much as digits as its factorization.

31021310421133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23782752 (or 23782475 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31021310421133 its reverse (33112401312013), we get a palindrome (64133711733146).

The spelling of 31021310421133 in words is "thirty-one trillion, twenty-one billion, three hundred ten million, four hundred twenty-one thousand, one hundred thirty-three".