31020112201 has 4 divisors (see below), whose sum is σ = 33406274692. Its totient is φ = 28633949712.

The previous prime is 31020112199. The next prime is 31020112217. The reversal of 31020112201 is 10221102013.

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 7025792400 + 23994319801 = 83820^2 + 154901^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020112201 - 2¹ = 31020112199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 2386162477 = 31020112201 / (3 + 1 + 0 + 2 + 0 + 1 + 1 + 2 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31020112241) 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, 1193081226 + ... + 1193081251.

It is an arithmetic number, because the mean of its divisors is an integer number (8351568673).

Almost surely, 2^31020112201 is an apocalyptic number.

It is an amenable number.

31020112201 is a deficient number, since it is larger than the sum of its proper divisors (2386162491).

31020112201 is a wasteful number, since it uses less digits than its factorization.

31020112201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386162490.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31020112201 its reverse (10221102013), we get a palindrome (41241214214).

The spelling of 31020112201 in words is "thirty-one billion, twenty million, one hundred twelve thousand, two hundred one".