1213133133 has 32 divisors (see below), whose sum is σ = 1724486400. Its totient is φ = 757209600.

The previous prime is 1213133113. The next prime is 1213133143. The reversal of 1213133133 is 3313313121.

It is not a de Polignac number, because 1213133133 - 2¹⁷ = 1213002061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213133113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 644688 + ... + 646566.

It is an arithmetic number, because the mean of its divisors is an integer number (53890200).

Almost surely, 2^1213133133 is an apocalyptic number.

It is an amenable number.

1213133133 is a deficient number, since it is larger than the sum of its proper divisors (511353267).

1213133133 is a wasteful number, since it uses less digits than its factorization.

1213133133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133.

The product of its digits is 486, while the sum is 21.

The square root of 1213133133 is about 34830.0607665275. The cubic root of 1213133133 is about 1066.5211888295.

Adding to 1213133133 its reverse (3313313121), we get a palindrome (4526446254).

The spelling of 1213133133 in words is "one billion, two hundred thirteen million, one hundred thirty-three thousand, one hundred thirty-three".