31023120220223 has 4 divisors (see below), whose sum is σ = 32848009644960. Its totient is φ = 29198230795488.

The previous prime is 31023120220187. The next prime is 31023120220243. The reversal of 31023120220223 is 32202202132013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31023120220223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023120220243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912444712343 + ... + 912444712376.

It is an arithmetic number, because the mean of its divisors is an integer number (8212002411240).

Almost surely, 2^{31023120220223} is an apocalyptic number.

31023120220223 is a deficient number, since it is larger than the sum of its proper divisors (1824889424737).

31023120220223 is a wasteful number, since it uses less digits than its factorization.

31023120220223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824889424736.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31023120220223 its reverse (32202202132013), we get a palindrome (63225322352236).

The spelling of 31023120220223 in words is "thirty-one trillion, twenty-three billion, one hundred twenty million, two hundred twenty thousand, two hundred twenty-three".