31201300123 has 6 divisors (see below), whose sum is σ = 36295389996. Its totient is φ = 26743971492.

The previous prime is 31201300121. The next prime is 31201300127. The reversal of 31201300123 is 32100310213.

It is not a de Polignac number, because 31201300123 - 2¹ = 31201300121 is a prime.

It is a super-2 number, since 2×31201300123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31201300097 and 31201300106.

It is not an unprimeable number, because it can be changed into a prime (31201300121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 318380565 + ... + 318380662.

It is an arithmetic number, because the mean of its divisors is an integer number (6049231666).

Almost surely, 2^31201300123 is an apocalyptic number.

31201300123 is a deficient number, since it is larger than the sum of its proper divisors (5094089873).

31201300123 is an equidigital number, since it uses as much as digits as its factorization.

31201300123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636761241 (or 636761234 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31201300123 its reverse (32100310213), we get a palindrome (63301610336).

The spelling of 31201300123 in words is "thirty-one billion, two hundred one million, three hundred thousand, one hundred twenty-three".