1231301133 has 24 divisors (see below), whose sum is σ = 1832297376. Its totient is φ = 796197600.

The previous prime is 1231301119. The next prime is 1231301209. The reversal of 1231301133 is 3311031321.

It is a happy number.

1231301133 is a `hidden beast` number, since 1 + 231 + 301 + 133 = 666.

It is not a de Polignac number, because 1231301133 - 2⁵ = 1231301101 is a prime.

It is a super-2 number, since 2×1231301133² = 3032204960254167378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231301033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104638 + ... + 115808.

It is an arithmetic number, because the mean of its divisors is an integer number (76345724).

Almost surely, 2^1231301133 is an apocalyptic number.

It is an amenable number.

1231301133 is a deficient number, since it is larger than the sum of its proper divisors (600996243).

1231301133 is a wasteful number, since it uses less digits than its factorization.

1231301133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11545 (or 11542 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1231301133 is about 35089.9007265623. The cubic root of 1231301133 is about 1071.8189380681.

Adding to 1231301133 its reverse (3311031321), we get a palindrome (4542332454).

The spelling of 1231301133 in words is "one billion, two hundred thirty-one million, three hundred one thousand, one hundred thirty-three".