31123023201 has 64 divisors (see below), whose sum is σ = 47897395200. Its totient is φ = 19961106048.

The previous prime is 31123023187. The next prime is 31123023203. The reversal of 31123023201 is 10232032113.

31123023201 is a `hidden beast` number, since 31 + 12 + 302 + 320 + 1 = 666.

It is not a de Polignac number, because 31123023201 - 2¹⁸ = 31122761057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31123023203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28370485 + ... + 28371581.

It is an arithmetic number, because the mean of its divisors is an integer number (748396800).

Almost surely, 2^31123023201 is an apocalyptic number.

It is an amenable number.

31123023201 is a deficient number, since it is larger than the sum of its proper divisors (16774371999).

31123023201 is a wasteful number, since it uses less digits than its factorization.

31123023201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515 (or 1509 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31123023201 its reverse (10232032113), we get a palindrome (41355055314).

The spelling of 31123023201 in words is "thirty-one billion, one hundred twenty-three million, twenty-three thousand, two hundred one".