1131121207 has 2 divisors, whose sum is σ = 1131121208. Its totient is φ = 1131121206.

The previous prime is 1131121193. The next prime is 1131121217. The reversal of 1131121207 is 7021211311.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131121207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131121217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565560603 + 565560604.

It is an arithmetic number, because the mean of its divisors is an integer number (565560604).

Almost surely, 2^1131121207 is an apocalyptic number.

1131121207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131121207 is an equidigital number, since it uses as much as digits as its factorization.

1131121207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 1131121207 is about 33632.1454415266. The cubic root of 1131121207 is about 1041.9248152545.

Adding to 1131121207 its reverse (7021211311), we get a palindrome (8152332518).

The spelling of 1131121207 in words is "one billion, one hundred thirty-one million, one hundred twenty-one thousand, two hundred seven".