31130123201 has 4 divisors (see below), whose sum is σ = 31158605652. Its totient is φ = 31101640752.

The previous prime is 31130123161. The next prime is 31130123231. The reversal of 31130123201 is 10232103113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30136612801 + 993510400 = 173599^2 + 31520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31130123201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31130123201.

It is not an unprimeable number, because it can be changed into a prime (31130123231) 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, 14239586 + ... + 14241771.

It is an arithmetic number, because the mean of its divisors is an integer number (7789651413).

Almost surely, 2^31130123201 is an apocalyptic number.

It is an amenable number.

31130123201 is a deficient number, since it is larger than the sum of its proper divisors (28482451).

31130123201 is a wasteful number, since it uses less digits than its factorization.

31130123201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28482450.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31130123201 its reverse (10232103113), we get a palindrome (41362226314).

The spelling of 31130123201 in words is "thirty-one billion, one hundred thirty million, one hundred twenty-three thousand, two hundred one".