31232112220123 has 4 divisors (see below), whose sum is σ = 31233892961320. Its totient is φ = 31230331478928.

The previous prime is 31232112220103. The next prime is 31232112220189. The reversal of 31232112220123 is 32102221123213.

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

It is a cyclic number.

It is not a de Polignac number, because 31232112220123 - 2²⁵ = 31232078665691 is a prime.

It is a super-2 number, since 2×31232112220123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31232112220103) 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, 890344290 + ... + 890379367.

It is an arithmetic number, because the mean of its divisors is an integer number (7808473240330).

Almost surely, 2^{31232112220123} is an apocalyptic number.

31232112220123 is a deficient number, since it is larger than the sum of its proper divisors (1780741197).

31232112220123 is a wasteful number, since it uses less digits than its factorization.

31232112220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780741196.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31232112220123 its reverse (32102221123213), we get a palindrome (63334333343336).

The spelling of 31232112220123 in words is "thirty-one trillion, two hundred thirty-two billion, one hundred twelve million, two hundred twenty thousand, one hundred twenty-three".