1131212986 has 4 divisors (see below), whose sum is σ = 1696819482. Its totient is φ = 565606492.

The previous prime is 1131212939. The next prime is 1131213011. The reversal of 1131212986 is 6892121311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1084714225 + 46498761 = 32935^2 + 6819^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282803245 + ... + 282803248.

Almost surely, 2^1131212986 is an apocalyptic number.

1131212986 is a deficient number, since it is larger than the sum of its proper divisors (565606496).

1131212986 is an equidigital number, since it uses as much as digits as its factorization.

1131212986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565606495.

The product of its digits is 5184, while the sum is 34.

The square root of 1131212986 is about 33633.5098673927. The cubic root of 1131212986 is about 1041.9529950319.

The spelling of 1131212986 in words is "one billion, one hundred thirty-one million, two hundred twelve thousand, nine hundred eighty-six".