1221111103223 has 8 divisors (see below), whose sum is σ = 1332611166720. Its totient is φ = 1109692700280.

The previous prime is 1221111103217. The next prime is 1221111103253. The reversal of 1221111103223 is 3223011111221.

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 1221111103223 - 2²⁴ = 1221094326007 is a prime.

It is a super-2 number, since 2×1221111103223² (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 = 1221111103195 and 1221111103204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221111103253) 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, 20383865 + ... + 20443682.

It is an arithmetic number, because the mean of its divisors is an integer number (166576395840).

Almost surely, 2^{1221111103223} is an apocalyptic number.

1221111103223 is a deficient number, since it is larger than the sum of its proper divisors (111500063497).

1221111103223 is a wasteful number, since it uses less digits than its factorization.

1221111103223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40830277.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1221111103223 its reverse (3223011111221), we get a palindrome (4444122214444).

The spelling of 1221111103223 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, one hundred three thousand, two hundred twenty-three".