31121030023 has 8 divisors (see below), whose sum is σ = 31188894480. Its totient is φ = 31053197760.

The previous prime is 31121029987. The next prime is 31121030041. The reversal of 31121030023 is 32003012113.

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 31121030023 - 2¹⁷ = 31120898951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31121029979 and 31121030006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121130023) 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, 3553536 + ... + 3562282.

It is an arithmetic number, because the mean of its divisors is an integer number (3898611810).

Almost surely, 2^31121030023 is an apocalyptic number.

31121030023 is a deficient number, since it is larger than the sum of its proper divisors (67864457).

31121030023 is an equidigital number, since it uses as much as digits as its factorization.

31121030023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16097.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31121030023 its reverse (32003012113), we get a palindrome (63124042136).

The spelling of 31121030023 in words is "thirty-one billion, one hundred twenty-one million, thirty thousand, twenty-three".