1213312023 has 24 divisors (see below), whose sum is σ = 2185013376. Its totient is φ = 630291600.

The previous prime is 1213312019. The next prime is 1213312033. The reversal of 1213312023 is 3202133121.

It is not a de Polignac number, because 1213312023 - 2² = 1213312019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213311987 and 1213312005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213312033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 874713 + ... + 876098.

It is an arithmetic number, because the mean of its divisors is an integer number (91042224).

Almost surely, 2^1213312023 is an apocalyptic number.

1213312023 is a deficient number, since it is larger than the sum of its proper divisors (971701353).

1213312023 is a wasteful number, since it uses less digits than its factorization.

1213312023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750835 (or 1750832 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1213312023 is about 34832.6287121716. The cubic root of 1213312023 is about 1066.5736097313.

Adding to 1213312023 its reverse (3202133121), we get a palindrome (4415445144).

It can be divided in two parts, 1213 and 312023, that added together give a triangular number (313236 = T₇₉₁).

The spelling of 1213312023 in words is "one billion, two hundred thirteen million, three hundred twelve thousand, twenty-three".