1213440023 has 2 divisors, whose sum is σ = 1213440024. Its totient is φ = 1213440022.

The previous prime is 1213439951. The next prime is 1213440071. The reversal of 1213440023 is 3200443121.

It is a strong prime.

It is an emirp because it is prime and its reverse (3200443121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213440023 - 2⁸ = 1213439767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213439977 and 1213440004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213440323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606720011 + 606720012.

It is an arithmetic number, because the mean of its divisors is an integer number (606720012).

Almost surely, 2^1213440023 is an apocalyptic number.

1213440023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213440023 is an equidigital number, since it uses as much as digits as its factorization.

1213440023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1213440023 is about 34834.4660214564. The cubic root of 1213440023 is about 1066.6111149563.

Adding to 1213440023 its reverse (3200443121), we get a palindrome (4413883144).

The spelling of 1213440023 in words is "one billion, two hundred thirteen million, four hundred forty thousand, twenty-three".