12223222213121 has 2 divisors, whose sum is σ = 12223222213122. Its totient is φ = 12223222213120.

The previous prime is 12223222213093. The next prime is 12223222213177. The reversal of 12223222213121 is 12131222232221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8320369095025 + 3902853118096 = 2884505^2 + 1975564^2 .

It is a cyclic number.

It is not a de Polignac number, because 12223222213121 - 2¹⁸ = 12223221950977 is a prime.

It is a super-2 number, since 2×12223222213121² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12223222213721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111611106560 + 6111611106561.

It is an arithmetic number, because the mean of its divisors is an integer number (6111611106561).

Almost surely, 2^{12223222213121} is an apocalyptic number.

It is an amenable number.

12223222213121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12223222213121 is an equidigital number, since it uses as much as digits as its factorization.

12223222213121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 26.

Adding to 12223222213121 its reverse (12131222232221), we get a palindrome (24354444445342).

The spelling of 12223222213121 in words is "twelve trillion, two hundred twenty-three billion, two hundred twenty-two million, two hundred thirteen thousand, one hundred twenty-one".