1321200023 has 8 divisors (see below), whose sum is σ = 1552179216. Its totient is φ = 1108699200.

The previous prime is 1321199977. The next prime is 1321200047. The reversal of 1321200023 is 3200021231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321200023 - 2¹² = 1321195927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321199980 and 1321200007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321200073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4619438 + ... + 4619723.

It is an arithmetic number, because the mean of its divisors is an integer number (194022402).

Almost surely, 2^1321200023 is an apocalyptic number.

1321200023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321200023 is a deficient number, since it is larger than the sum of its proper divisors (230979193).

1321200023 is a wasteful number, since it uses less digits than its factorization.

1321200023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9239185.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1321200023 is about 36348.3152704496. The cubic root of 1321200023 is about 1097.2936286920.

Adding to 1321200023 its reverse (3200021231), we get a palindrome (4521221254).

The spelling of 1321200023 in words is "one billion, three hundred twenty-one million, two hundred thousand, twenty-three".