31113121000031 has 32 divisors (see below), whose sum is σ = 37399766446080. Its totient is φ = 25324801842816.

The previous prime is 31113120999977. The next prime is 31113121000043. The reversal of 31113121000031 is 13000012131113.

It is not a de Polignac number, because 31113121000031 - 2⁶ = 31113120999967 is a prime.

It is a super-2 number, since 2×31113121000031² (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 = 31113120999973 and 31113121000009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113121020031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 810341 + ... + 7929873.

It is an arithmetic number, because the mean of its divisors is an integer number (1168742701440).

Almost surely, 2^{31113121000031} is an apocalyptic number.

31113121000031 is a deficient number, since it is larger than the sum of its proper divisors (6286645446049).

31113121000031 is a wasteful number, since it uses less digits than its factorization.

31113121000031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7119983.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 31113121000031 its reverse (13000012131113), we get a palindrome (44113133131144).

The spelling of 31113121000031 in words is "thirty-one trillion, one hundred thirteen billion, one hundred twenty-one million, thirty-one", and thus it is an aban number.