31121234013 has 8 divisors (see below), whose sum is σ = 43299108288. Its totient is φ = 19845424544.

The previous prime is 31121234003. The next prime is 31121234033. The reversal of 31121234013 is 31043212113.

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 31121234013 - 2⁹ = 31121233501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121234003) 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, 225516120 + ... + 225516257.

It is an arithmetic number, because the mean of its divisors is an integer number (5412388536).

Almost surely, 2^31121234013 is an apocalyptic number.

It is an amenable number.

31121234013 is a deficient number, since it is larger than the sum of its proper divisors (12177874275).

31121234013 is a wasteful number, since it uses less digits than its factorization.

31121234013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451032403.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31121234013 its reverse (31043212113), we get a palindrome (62164446126).

The spelling of 31121234013 in words is "thirty-one billion, one hundred twenty-one million, two hundred thirty-four thousand, thirteen".