1213231233 has 16 divisors (see below), whose sum is σ = 1627629120. Its totient is φ = 803841024.

The previous prime is 1213231223. The next prime is 1213231249. The reversal of 1213231233 is 3321323121.

It is not a de Polignac number, because 1213231233 - 2¹⁰ = 1213230209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213231223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469138 + ... + 471716.

It is an arithmetic number, because the mean of its divisors is an integer number (101726820).

Almost surely, 2^1213231233 is an apocalyptic number.

It is an amenable number.

1213231233 is a deficient number, since it is larger than the sum of its proper divisors (414397887).

1213231233 is a wasteful number, since it uses less digits than its factorization.

1213231233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488.

The product of its digits is 648, while the sum is 21.

The square root of 1213231233 is about 34831.4690043357. The cubic root of 1213231233 is about 1066.5499361302.

Adding to 1213231233 its reverse (3321323121), we get a palindrome (4534554354).

It can be divided in two parts, 12132 and 31233, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 1213231233 in words is "one billion, two hundred thirteen million, two hundred thirty-one thousand, two hundred thirty-three".