31243334123 has 4 divisors (see below), whose sum is σ = 31546667568. Its totient is φ = 30940000680.

The previous prime is 31243334119. The next prime is 31243334131. The reversal of 31243334123 is 32143334213.

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 31243334123 - 2² = 31243334119 is a prime.

It is a super-2 number, since 2×31243334123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31243339123) 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, 151666568 + ... + 151666773.

It is an arithmetic number, because the mean of its divisors is an integer number (7886666892).

Almost surely, 2^31243334123 is an apocalyptic number.

31243334123 is a deficient number, since it is larger than the sum of its proper divisors (303333445).

31243334123 is a wasteful number, since it uses less digits than its factorization.

31243334123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303333444.

The product of its digits is 15552, while the sum is 29.

Adding to 31243334123 its reverse (32143334213), we get a palindrome (63386668336).

The spelling of 31243334123 in words is "thirty-one billion, two hundred forty-three million, three hundred thirty-four thousand, one hundred twenty-three".