1221113201223 has 8 divisors (see below), whose sum is σ = 1628190975600. Its totient is φ = 814055447168.

The previous prime is 1221113201173. The next prime is 1221113201369. The reversal of 1221113201223 is 3221023111221.

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 1221113201223 - 2⁶ = 1221113201159 is a prime.

It is a super-2 number, since 2×1221113201223² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221113201223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221113201123) 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, 4862178 + ... + 5107151.

It is an arithmetic number, because the mean of its divisors is an integer number (203523871950).

Almost surely, 2^{1221113201223} is an apocalyptic number.

1221113201223 is a deficient number, since it is larger than the sum of its proper divisors (407077774377).

1221113201223 is an equidigital number, since it uses as much as digits as its factorization.

1221113201223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010161.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1221113201223 its reverse (3221023111221), we get a palindrome (4442136312444).

The spelling of 1221113201223 in words is "one trillion, two hundred twenty-one billion, one hundred thirteen million, two hundred one thousand, two hundred twenty-three".