31223141123123 has 4 divisors (see below), whose sum is σ = 31386613066368. Its totient is φ = 31059669179880.

The previous prime is 31223141123089. The next prime is 31223141123147. The reversal of 31223141123123 is 32132114132213.

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 31223141123123 - 2¹⁰ = 31223141122099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31223141153123) 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, 81735971336 + ... + 81735971717.

It is an arithmetic number, because the mean of its divisors is an integer number (7846653266592).

Almost surely, 2^{31223141123123} is an apocalyptic number.

31223141123123 is a deficient number, since it is larger than the sum of its proper divisors (163471943245).

31223141123123 is a wasteful number, since it uses less digits than its factorization.

31223141123123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163471943244.

The product of its digits is 5184, while the sum is 29.

Adding to 31223141123123 its reverse (32132114132213), we get a palindrome (63355255255336).

The spelling of 31223141123123 in words is "thirty-one trillion, two hundred twenty-three billion, one hundred forty-one million, one hundred twenty-three thousand, one hundred twenty-three".