1131122501 has 2 divisors, whose sum is σ = 1131122502. Its totient is φ = 1131122500.

The previous prime is 1131122491. The next prime is 1131122521. The reversal of 1131122501 is 1052211311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 826620001 + 304502500 = 28751^2 + 17450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131122501 - 2¹⁰ = 1131121477 is a prime.

It is a super-2 number, since 2×1131122501² = 2558876224536990002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131122501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131122521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565561250 + 565561251.

It is an arithmetic number, because the mean of its divisors is an integer number (565561251).

Almost surely, 2^1131122501 is an apocalyptic number.

It is an amenable number.

1131122501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131122501 is an equidigital number, since it uses as much as digits as its factorization.

1131122501 is an evil number, because the sum of its binary digits is even.

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

The square root of 1131122501 is about 33632.1646790688. The cubic root of 1131122501 is about 1041.9252125742.

Adding to 1131122501 its reverse (1052211311), we get a palindrome (2183333812).

The spelling of 1131122501 in words is "one billion, one hundred thirty-one million, one hundred twenty-two thousand, five hundred one".