1131211011 has 12 divisors (see below), whose sum is σ = 1754531592. Its totient is φ = 646406208.

The previous prime is 1131211007. The next prime is 1131211043. The reversal of 1131211011 is 1101121311.

It is not a de Polignac number, because 1131211011 - 2² = 1131211007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131213011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3847510 + ... + 3847803.

It is an arithmetic number, because the mean of its divisors is an integer number (146210966).

Almost surely, 2^1131211011 is an apocalyptic number.

1131211011 is a deficient number, since it is larger than the sum of its proper divisors (623320581).

1131211011 is an equidigital number, since it uses as much as digits as its factorization.

1131211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7695330 (or 7695323 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 12.

The square root of 1131211011 is about 33633.4805067807. The cubic root of 1131211011 is about 1041.9523886449.

Adding to 1131211011 its reverse (1101121311), we get a palindrome (2232332322).

The spelling of 1131211011 in words is "one billion, one hundred thirty-one million, two hundred eleven thousand, eleven".