1200401023 has 2 divisors, whose sum is σ = 1200401024. Its totient is φ = 1200401022.

The previous prime is 1200401021. The next prime is 1200401039. The reversal of 1200401023 is 3201040021.

It is a weak prime.

It is an emirp because it is prime and its reverse (3201040021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200401023 - 2¹ = 1200401021 is a prime.

Together with 1200401021, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1200400994 and 1200401012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200401021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600200511 + 600200512.

It is an arithmetic number, because the mean of its divisors is an integer number (600200512).

Almost surely, 2^1200401023 is an apocalyptic number.

1200401023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200401023 is an equidigital number, since it uses as much as digits as its factorization.

1200401023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1200401023 is about 34646.8039362940. The cubic root of 1200401023 is about 1062.7769311451.

Adding to 1200401023 its reverse (3201040021), we get a palindrome (4401441044).

The spelling of 1200401023 in words is "one billion, two hundred million, four hundred one thousand, twenty-three".