1213320123 has 12 divisors (see below), whose sum is σ = 1754782848. Its totient is φ = 807860400.

The previous prime is 1213320113. The next prime is 1213320133. The reversal of 1213320123 is 3210233121.

1213320123 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1213320113) and next prime (1213320133).

It is not a de Polignac number, because 1213320123 - 2²⁶ = 1146211259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213320096 and 1213320105.

It is not an unprimeable number, because it can be changed into a prime (1213320113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77403 + ... + 91748.

It is an arithmetic number, because the mean of its divisors is an integer number (146231904).

Almost surely, 2^1213320123 is an apocalyptic number.

1213320123 is a deficient number, since it is larger than the sum of its proper divisors (541462725).

1213320123 is a wasteful number, since it uses less digits than its factorization.

1213320123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169954 (or 169951 counting only the distinct ones).

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

The square root of 1213320123 is about 34832.7449822721. The cubic root of 1213320123 is about 1066.5759831870.

Adding to 1213320123 its reverse (3210233121), we get a palindrome (4423553244).

The spelling of 1213320123 in words is "one billion, two hundred thirteen million, three hundred twenty thousand, one hundred twenty-three".