31311021131123 has 8 divisors (see below), whose sum is σ = 33321134464992. Its totient is φ = 29319606526336.

The previous prime is 31311021131081. The next prime is 31311021131141. The reversal of 31311021131123 is 32113112011313.

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 31311021131123 - 2²² = 31311016936819 is a prime.

It is a super-2 number, since 2×31311021131123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311021131183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4674678815 + ... + 4674685512.

It is an arithmetic number, because the mean of its divisors is an integer number (4165141808124).

Almost surely, 2^{31311021131123} is an apocalyptic number.

31311021131123 is a deficient number, since it is larger than the sum of its proper divisors (2010113333869).

31311021131123 is a wasteful number, since it uses less digits than its factorization.

31311021131123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9349364541.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 31311021131123 its reverse (32113112011313), we get a palindrome (63424133142436).

The spelling of 31311021131123 in words is "thirty-one trillion, three hundred eleven billion, twenty-one million, one hundred thirty-one thousand, one hundred twenty-three".