1221112013323 has 4 divisors (see below), whose sum is σ = 1222853971248. Its totient is φ = 1219370055400.

The previous prime is 1221112013309. The next prime is 1221112013353. The reversal of 1221112013323 is 3233102111221.

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 1221112013323 - 2²⁵ = 1221078458891 is a prime.

It is a super-2 number, since 2×1221112013323² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221112013294 and 1221112013303.

It is not an unprimeable number, because it can be changed into a prime (1221112013353) 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, 870977911 + ... + 870979312.

It is an arithmetic number, because the mean of its divisors is an integer number (305713492812).

Almost surely, 2^{1221112013323} is an apocalyptic number.

1221112013323 is a deficient number, since it is larger than the sum of its proper divisors (1741957925).

1221112013323 is an equidigital number, since it uses as much as digits as its factorization.

1221112013323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741957924.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1221112013323 its reverse (3233102111221), we get a palindrome (4454214124544).

The spelling of 1221112013323 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, thirteen thousand, three hundred twenty-three".