31320200123 has 4 divisors (see below), whose sum is σ = 31566816000. Its totient is φ = 31073584248.

The previous prime is 31320200099. The next prime is 31320200137. The reversal of 31320200123 is 32100202313.

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 31320200123 - 2³² = 27025232827 is a prime.

It is a super-3 number, since 3×31320200123³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31320200423) 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, 123307748 + ... + 123308001.

It is an arithmetic number, because the mean of its divisors is an integer number (7891704000).

Almost surely, 2^31320200123 is an apocalyptic number.

31320200123 is a deficient number, since it is larger than the sum of its proper divisors (246615877).

31320200123 is a wasteful number, since it uses less digits than its factorization.

31320200123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246615876.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31320200123 its reverse (32100202313), we get a palindrome (63420402436).

The spelling of 31320200123 in words is "thirty-one billion, three hundred twenty million, two hundred thousand, one hundred twenty-three".