1131213133 has 8 divisors (see below), whose sum is σ = 1198151352. Its totient is φ = 1064318976.

The previous prime is 1131213101. The next prime is 1131213137. The reversal of 1131213133 is 3313121311.

It can be written as a sum of positive squares in 4 ways, for example, as 188293284 + 942919849 = 13722^2 + 30707^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1131213133 - 2⁵ = 1131213101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131213133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131213137) 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, 52291 + ... + 70687.

It is an arithmetic number, because the mean of its divisors is an integer number (149768919).

Almost surely, 2^1131213133 is an apocalyptic number.

It is an amenable number.

1131213133 is a deficient number, since it is larger than the sum of its proper divisors (66938219).

1131213133 is a wasteful number, since it uses less digits than its factorization.

1131213133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22031.

The product of its digits is 162, while the sum is 19.

The square root of 1131213133 is about 33633.5120527131. The cubic root of 1131213133 is about 1041.9530401654.

Adding to 1131213133 its reverse (3313121311), we get a palindrome (4444334444).

The spelling of 1131213133 in words is "one billion, one hundred thirty-one million, two hundred thirteen thousand, one hundred thirty-three".