1131111151 has 2 divisors, whose sum is σ = 1131111152. Its totient is φ = 1131111150.

The previous prime is 1131111139. The next prime is 1131111161. The reversal of 1131111151 is 1511111311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1131111151 - 2⁹ = 1131110639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131111101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565555575 + 565555576.

It is an arithmetic number, because the mean of its divisors is an integer number (565555576).

Almost surely, 2^1131111151 is an apocalyptic number.

1131111151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131111151 is an equidigital number, since it uses as much as digits as its factorization.

1131111151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15, while the sum is 16.

The square root of 1131111151 is about 33631.9959413651. The cubic root of 1131111151 is about 1041.9217275727.

Adding to 1131111151 its reverse (1511111311), we get a palindrome (2642222462).

The spelling of 1131111151 in words is "one billion, one hundred thirty-one million, one hundred eleven thousand, one hundred fifty-one".