1131201011 has 2 divisors, whose sum is σ = 1131201012. Its totient is φ = 1131201010.

The previous prime is 1131200977. The next prime is 1131201023. The reversal of 1131201011 is 1101021311.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131201011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131200983 and 1131201001.

It is not a weakly prime, because it can be changed into another prime (1131201031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565600505 + 565600506.

It is an arithmetic number, because the mean of its divisors is an integer number (565600506).

Almost surely, 2^1131201011 is an apocalyptic number.

1131201011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131201011 is an equidigital number, since it uses as much as digits as its factorization.

1131201011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1131201011 is about 33633.3318450611. The cubic root of 1131201011 is about 1041.9493183204.

Adding to 1131201011 its reverse (1101021311), we get a palindrome (2232222322).

The spelling of 1131201011 in words is "one billion, one hundred thirty-one million, two hundred one thousand, eleven".