1321223011103 has 4 divisors (see below), whose sum is σ = 1321843014648. Its totient is φ = 1320603007560.

The previous prime is 1321223011099. The next prime is 1321223011111. The reversal of 1321223011103 is 3011103221231.

It is a happy number.

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 1321223011103 - 2² = 1321223011099 is a prime.

It is a super-2 number, since 2×1321223011103² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321223011193) 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, 309998576 + ... + 310002837.

It is an arithmetic number, because the mean of its divisors is an integer number (330460753662).

Almost surely, 2^{1321223011103} is an apocalyptic number.

1321223011103 is a deficient number, since it is larger than the sum of its proper divisors (620003545).

1321223011103 is an equidigital number, since it uses as much as digits as its factorization.

1321223011103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620003544.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321223011103 its reverse (3011103221231), we get a palindrome (4332326232334).

The spelling of 1321223011103 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-three million, eleven thousand, one hundred three".