31120033213 has 8 divisors (see below), whose sum is σ = 32952487608. Its totient is φ = 29287785984.

The previous prime is 31120033211. The next prime is 31120033261. The reversal of 31120033213 is 31233002113.

It can be written as a sum of positive squares in 4 ways, for example, as 3735409924 + 27384623289 = 61118^2 + 165483^2 .

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 31120033213 - 2¹ = 31120033211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120033211) 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, 343945 + ... + 424897.

It is an arithmetic number, because the mean of its divisors is an integer number (4119060951).

Almost surely, 2^31120033213 is an apocalyptic number.

It is an amenable number.

31120033213 is a deficient number, since it is larger than the sum of its proper divisors (1832454395).

31120033213 is a wasteful number, since it uses less digits than its factorization.

31120033213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103583.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31120033213 its reverse (31233002113), we get a palindrome (62353035326).

The spelling of 31120033213 in words is "thirty-one billion, one hundred twenty million, thirty-three thousand, two hundred thirteen".