1221121302223 has 8 divisors (see below), whose sum is σ = 1233246671280. Its totient is φ = 1208996620800.

The previous prime is 1221121302221. The next prime is 1221121302227. The reversal of 1221121302223 is 3222031211221.

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 1221121302223 - 2¹ = 1221121302221 is a prime.

It is a super-2 number, since 2×1221121302223² (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 = 1221121302194 and 1221121302203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221121302221) 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, 3865711 + ... + 4169647.

It is an arithmetic number, because the mean of its divisors is an integer number (154155833910).

Almost surely, 2^{1221121302223} is an apocalyptic number.

1221121302223 is a deficient number, since it is larger than the sum of its proper divisors (12125369057).

1221121302223 is a wasteful number, since it uses less digits than its factorization.

1221121302223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343817.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1221121302223 its reverse (3222031211221), we get a palindrome (4443152513444).

The spelling of 1221121302223 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-one million, three hundred two thousand, two hundred twenty-three".