31323021113 has 8 divisors (see below), whose sum is σ = 31825806336. Its totient is φ = 30822228000.

The previous prime is 31323021091. The next prime is 31323021127. The reversal of 31323021113 is 31112032313.

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 31323021113 - 2⁸ = 31323020857 is a prime.

It is a super-2 number, since 2×31323021113² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31323021013) 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, 466313 + ... + 529238.

It is an arithmetic number, because the mean of its divisors is an integer number (3978225792).

Almost surely, 2^31323021113 is an apocalyptic number.

It is an amenable number.

31323021113 is a deficient number, since it is larger than the sum of its proper divisors (502785223).

31323021113 is an equidigital number, since it uses as much as digits as its factorization.

31323021113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996055.

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

Adding to 31323021113 its reverse (31112032313), we get a palindrome (62435053426).

The spelling of 31323021113 in words is "thirty-one billion, three hundred twenty-three million, twenty-one thousand, one hundred thirteen".