31331121023 has 8 divisors (see below), whose sum is σ = 33496208928. Its totient is φ = 29201819904.

The previous prime is 31331120999. The next prime is 31331121131. The reversal of 31331121023 is 32012113313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31331121023 - 2¹⁴ = 31331104639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31331120986 and 31331121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31331123023) 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, 8944886 + ... + 8948387.

It is an arithmetic number, because the mean of its divisors is an integer number (4187026116).

Almost surely, 2^31331121023 is an apocalyptic number.

31331121023 is a deficient number, since it is larger than the sum of its proper divisors (2165087905).

31331121023 is a wasteful number, since it uses less digits than its factorization.

31331121023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17893393.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31331121023 its reverse (32012113313), we get a palindrome (63343234336).

The spelling of 31331121023 in words is "thirty-one billion, three hundred thirty-one million, one hundred twenty-one thousand, twenty-three".