1131261011 has 2 divisors, whose sum is σ = 1131261012. Its totient is φ = 1131261010.

The previous prime is 1131260993. The next prime is 1131261023. The reversal of 1131261011 is 1101621311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1131261011 - 2⁶ = 1131260947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131261211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565630505 + 565630506.

It is an arithmetic number, because the mean of its divisors is an integer number (565630506).

Almost surely, 2^1131261011 is an apocalyptic number.

1131261011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131261011 is an equidigital number, since it uses as much as digits as its factorization.

1131261011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 1131261011 is about 33634.2238055229. The cubic root of 1131261011 is about 1041.9677399959.

Adding to 1131261011 its reverse (1101621311), we get a palindrome (2232882322).

The spelling of 1131261011 in words is "one billion, one hundred thirty-one million, two hundred sixty-one thousand, eleven".