1121958251 has 2 divisors, whose sum is σ = 1121958252. Its totient is φ = 1121958250.

The previous prime is 1121958241. The next prime is 1121958283. The reversal of 1121958251 is 1528591211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121958251 - 2²² = 1117763947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121958221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560979125 + 560979126.

It is an arithmetic number, because the mean of its divisors is an integer number (560979126).

Almost surely, 2^1121958251 is an apocalyptic number.

1121958251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121958251 is an equidigital number, since it uses as much as digits as its factorization.

1121958251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 35.

The square root of 1121958251 is about 33495.6452542715. The cubic root of 1121958251 is about 1039.1037183676.

The spelling of 1121958251 in words is "one billion, one hundred twenty-one million, nine hundred fifty-eight thousand, two hundred fifty-one".