31122201245 has 4 divisors (see below), whose sum is σ = 37346641500. Its totient is φ = 24897760992.

The previous prime is 31122201211. The next prime is 31122201251. The reversal of 31122201245 is 54210222113.

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 16658290489 + 14463910756 = 129067^2 + 120266^2 .

It is a cyclic number.

It is not a de Polignac number, because 31122201245 - 2⁶ = 31122201181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31122201245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3112220120 + ... + 3112220129.

It is an arithmetic number, because the mean of its divisors is an integer number (9336660375).

Almost surely, 2^31122201245 is an apocalyptic number.

It is an amenable number.

31122201245 is a deficient number, since it is larger than the sum of its proper divisors (6224440255).

31122201245 is an equidigital number, since it uses as much as digits as its factorization.

31122201245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6224440254.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 31122201245 its reverse (54210222113), we get a palindrome (85332423358).

The spelling of 31122201245 in words is "thirty-one billion, one hundred twenty-two million, two hundred one thousand, two hundred forty-five".