31112123051 has 2 divisors, whose sum is σ = 31112123052. Its totient is φ = 31112123050.

The previous prime is 31112123027. The next prime is 31112123071. The reversal of 31112123051 is 15032121113.

It is an a-pointer prime, because the next prime (31112123071) can be obtained adding 31112123051 to its sum of digits (20).

It is a strong prime.

It is an emirp because it is prime and its reverse (15032121113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31112123051 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (31112123071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556061525 + 15556061526.

It is an arithmetic number, because the mean of its divisors is an integer number (15556061526).

Almost surely, 2^31112123051 is an apocalyptic number.

31112123051 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112123051 is an equidigital number, since it uses as much as digits as its factorization.

31112123051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 31112123051 its reverse (15032121113), we get a palindrome (46144244164).

The spelling of 31112123051 in words is "thirty-one billion, one hundred twelve million, one hundred twenty-three thousand, fifty-one".