1213240023 has 6 divisors (see below), whose sum is σ = 1752457824. Its totient is φ = 808826676.

The previous prime is 1213240001. The next prime is 1213240033. The reversal of 1213240023 is 3200423121.

It is not a de Polignac number, because 1213240023 - 2⁵ = 1213239991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213239978 and 1213240005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213240033) 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 5 ways as a sum of consecutive naturals, for example, 67402215 + ... + 67402232.

It is an arithmetic number, because the mean of its divisors is an integer number (292076304).

Almost surely, 2^1213240023 is an apocalyptic number.

1213240023 is a deficient number, since it is larger than the sum of its proper divisors (539217801).

1213240023 is a wasteful number, since it uses less digits than its factorization.

1213240023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134804453 (or 134804450 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1213240023 is about 34831.5951831093. The cubic root of 1213240023 is about 1066.5525118830.

Adding to 1213240023 its reverse (3200423121), we get a palindrome (4413663144).

The spelling of 1213240023 in words is "one billion, two hundred thirteen million, two hundred forty thousand, twenty-three".