1131211131 has 8 divisors (see below), whose sum is σ = 1508445504. Its totient is φ = 754058760.

The previous prime is 1131211117. The next prime is 1131211153. The reversal of 1131211131 is 1311121311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1131211131 - 2⁵ = 1131211099 is a prime.

It is a super-2 number, since 2×1131211131² = 2559277245796598322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1131211131.

It is not an unprimeable number, because it can be changed into a prime (1131216131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28260 + ... + 55326.

It is an arithmetic number, because the mean of its divisors is an integer number (188555688).

Almost surely, 2^1131211131 is an apocalyptic number.

1131211131 is a deficient number, since it is larger than the sum of its proper divisors (377234373).

1131211131 is a wasteful number, since it uses less digits than its factorization.

1131211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41001.

The product of its digits is 18, while the sum is 15.

The square root of 1131211131 is about 33633.4822907174. The cubic root of 1131211131 is about 1041.9524254887.

Adding to 1131211131 its reverse (1311121311), we get a palindrome (2442332442).

The spelling of 1131211131 in words is "one billion, one hundred thirty-one million, two hundred eleven thousand, one hundred thirty-one".