1200023221123 has 4 divisors (see below), whose sum is σ = 1201212541480. Its totient is φ = 1198833900768.

The previous prime is 1200023221093. The next prime is 1200023221129. The reversal of 1200023221123 is 3211223200021.

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 1200023221123 - 2⁹ = 1200023220611 is a prime.

It is a super-2 number, since 2×1200023221123² (a number of 25 digits) contains 22 as substring.

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 1200023221123.

It is not an unprimeable number, because it can be changed into a prime (1200023221129) 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, 594658665 + ... + 594660682.

It is an arithmetic number, because the mean of its divisors is an integer number (300303135370).

Almost surely, 2^{1200023221123} is an apocalyptic number.

1200023221123 is a deficient number, since it is larger than the sum of its proper divisors (1189320357).

1200023221123 is a wasteful number, since it uses less digits than its factorization.

1200023221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189320356.

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

Adding to 1200023221123 its reverse (3211223200021), we get a palindrome (4411246421144).

The spelling of 1200023221123 in words is "one trillion, two hundred billion, twenty-three million, two hundred twenty-one thousand, one hundred twenty-three".