1213041323 has 4 divisors (see below), whose sum is σ = 1306352208. Its totient is φ = 1119730440.

The previous prime is 1213041317. The next prime is 1213041329. The reversal of 1213041323 is 3231403121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1213041317) and next prime (1213041329).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213041323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213041295 and 1213041304.

It is not an unprimeable number, because it can be changed into a prime (1213041329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46655423 + ... + 46655448.

It is an arithmetic number, because the mean of its divisors is an integer number (326588052).

Almost surely, 2^1213041323 is an apocalyptic number.

1213041323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1213041323 is a deficient number, since it is larger than the sum of its proper divisors (93310885).

1213041323 is an equidigital number, since it uses as much as digits as its factorization.

1213041323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93310884.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1213041323 is about 34828.7427708782. The cubic root of 1213041323 is about 1066.4942833515.

Adding to 1213041323 its reverse (3231403121), we get a palindrome (4444444444).

The spelling of 1213041323 in words is "one billion, two hundred thirteen million, forty-one thousand, three hundred twenty-three".