31220113320023 has 8 divisors (see below), whose sum is σ = 33077931202800. Its totient is φ = 29364666618240.

The previous prime is 31220113319897. The next prime is 31220113320041. The reversal of 31220113320023 is 32002331102213.

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 31220113320023 - 2¹⁸ = 31220113057879 is a prime.

It is a super-2 number, since 2×31220113320023² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220113320043) 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, 592768133 + ... + 592820798.

It is an arithmetic number, because the mean of its divisors is an integer number (4134741400350).

Almost surely, 2^{31220113320023} is an apocalyptic number.

31220113320023 is a deficient number, since it is larger than the sum of its proper divisors (1857817882777).

31220113320023 is a wasteful number, since it uses less digits than its factorization.

31220113320023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185590497.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31220113320023 its reverse (32002331102213), we get a palindrome (63222444422236).

The spelling of 31220113320023 in words is "thirty-one trillion, two hundred twenty billion, one hundred thirteen million, three hundred twenty thousand, twenty-three".