1200021231223 has 4 divisors (see below), whose sum is σ = 1200028346280. Its totient is φ = 1200014116168.

The previous prime is 1200021231217. The next prime is 1200021231251. The reversal of 1200021231223 is 3221321200021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1200021231223 - 2¹³ = 1200021223031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200021231223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200021231023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3298240 + ... + 3643957.

It is an arithmetic number, because the mean of its divisors is an integer number (300007086570).

Almost surely, 2^{1200021231223} is an apocalyptic number.

1200021231223 is a deficient number, since it is larger than the sum of its proper divisors (7115057).

1200021231223 is an equidigital number, since it uses as much as digits as its factorization.

1200021231223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7115056.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1200021231223 its reverse (3221321200021), we get a palindrome (4421342431244).

The spelling of 1200021231223 in words is "one trillion, two hundred billion, twenty-one million, two hundred thirty-one thousand, two hundred twenty-three".