31021021131324 has 96 divisors (see below), whose sum is σ = 86530415139840. Its totient is φ = 8457066275328.

The previous prime is 31021021131323. The next prime is 31021021131349. The reversal of 31021021131324 is 42313112012013.

It is a junction number, because it is equal to n+sod(n) for n = 31021021131294 and 31021021131303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021021131323) 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, 18838699 + ... + 20419074.

It is an arithmetic number, because the mean of its divisors is an integer number (901358491040).

Almost surely, 2^{31021021131324} is an apocalyptic number.

It is an amenable number.

31021021131324 is an abundant number, since it is smaller than the sum of its proper divisors (55509394008516).

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

31021021131324 is a wasteful number, since it uses less digits than its factorization.

31021021131324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39258219 (or 39258217 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 31021021131324 its reverse (42313112012013), we get a palindrome (73334133143337).

The spelling of 31021021131324 in words is "thirty-one trillion, twenty-one billion, twenty-one million, one hundred thirty-one thousand, three hundred twenty-four".