31231312023120 has 1920 divisors, whose sum is σ = 120289774961664. Its totient is φ = 6661079040000.

The previous prime is 31231312023101. The next prime is 31231312023127. The reversal of 31231312023120 is 2132021313213.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231312023127) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 129590506200 + ... + 129590506440.

Almost surely, 2^{31231312023120} is an apocalyptic number.

31231312023120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31231312023120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60144887480832).

31231312023120 is an abundant number, since it is smaller than the sum of its proper divisors (89058462938544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31231312023120 is a wasteful number, since it uses less digits than its factorization.

31231312023120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31231312023120 its reverse (2132021313213), we get a palindrome (33363333336333).

The spelling of 31231312023120 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twelve million, twenty-three thousand, one hundred twenty".