1131210251 has 2 divisors, whose sum is σ = 1131210252. Its totient is φ = 1131210250.

The previous prime is 1131210247. The next prime is 1131210299. The reversal of 1131210251 is 1520121311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131210251 - 2² = 1131210247 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131218251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565605125 + 565605126.

It is an arithmetic number, because the mean of its divisors is an integer number (565605126).

Almost surely, 2^1131210251 is an apocalyptic number.

1131210251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131210251 is an equidigital number, since it uses as much as digits as its factorization.

1131210251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 1131210251 is about 33633.4692085131. The cubic root of 1131210251 is about 1041.9521553009.

Adding to 1131210251 its reverse (1520121311), we get a palindrome (2651331562).

The spelling of 1131210251 in words is "one billion, one hundred thirty-one million, two hundred ten thousand, two hundred fifty-one".