31220321123023 has 8 divisors (see below), whose sum is σ = 31983160154400. Its totient is φ = 30457547224320.

The previous prime is 31220321123011. The next prime is 31220321123029. The reversal of 31220321123023 is 32032112302213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31220321123023 is a prime.

It is a super-2 number, since 2×31220321123023² (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 (31220321123029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15312090 + ... + 17230807.

It is an arithmetic number, because the mean of its divisors is an integer number (3997895019300).

Almost surely, 2^{31220321123023} is an apocalyptic number.

31220321123023 is a deficient number, since it is larger than the sum of its proper divisors (762839031377).

31220321123023 is a wasteful number, since it uses less digits than its factorization.

31220321123023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32566337.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31220321123023 its reverse (32032112302213), we get a palindrome (63252433425236).

The spelling of 31220321123023 in words is "thirty-one trillion, two hundred twenty billion, three hundred twenty-one million, one hundred twenty-three thousand, twenty-three".