3121112251 has 2 divisors, whose sum is σ = 3121112252. Its totient is φ = 3121112250.

The previous prime is 3121112227. The next prime is 3121112279. The reversal of 3121112251 is 1522111213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3121112251 - 2¹³ = 3121104059 is a prime.

It is not a weakly prime, because it can be changed into another prime (3121112051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560556125 + 1560556126.

It is an arithmetic number, because the mean of its divisors is an integer number (1560556126).

Almost surely, 2^3121112251 is an apocalyptic number.

3121112251 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121112251 is an equidigital number, since it uses as much as digits as its factorization.

3121112251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 19.

The square root of 3121112251 is about 55866.9155314664. The cubic root of 3121112251 is about 1461.4023323348.

Adding to 3121112251 its reverse (1522111213), we get a palindrome (4643223464).

The spelling of 3121112251 in words is "three billion, one hundred twenty-one million, one hundred twelve thousand, two hundred fifty-one".