31121254245 has 8 divisors (see below), whose sum is σ = 49794006816. Its totient is φ = 16598002256.

The previous prime is 31121254169. The next prime is 31121254247. The reversal of 31121254245 is 54245212113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31121254245 - 2⁹ = 31121253733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121254247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1037375127 + ... + 1037375156.

It is an arithmetic number, because the mean of its divisors is an integer number (6224250852).

Almost surely, 2^31121254245 is an apocalyptic number.

It is an amenable number.

31121254245 is a deficient number, since it is larger than the sum of its proper divisors (18672752571).

31121254245 is a wasteful number, since it uses less digits than its factorization.

31121254245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074750291.

The product of its digits is 9600, while the sum is 30.

Adding to 31121254245 its reverse (54245212113), we get a palindrome (85366466358).

The spelling of 31121254245 in words is "thirty-one billion, one hundred twenty-one million, two hundred fifty-four thousand, two hundred forty-five".