212223313121 has 32 divisors (see below), whose sum is σ = 229851578880. Its totient is φ = 195349190400.

The previous prime is 212223313051. The next prime is 212223313147. The reversal of 212223313121 is 121313322212.

It is a cyclic number.

It is not a de Polignac number, because 212223313121 - 2¹⁴ = 212223296737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212223313171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23339786 + ... + 23348876.

It is an arithmetic number, because the mean of its divisors is an integer number (7182861840).

Almost surely, 2^212223313121 is an apocalyptic number.

It is an amenable number.

212223313121 is a deficient number, since it is larger than the sum of its proper divisors (17628265759).

212223313121 is a wasteful number, since it uses less digits than its factorization.

212223313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9437.

The product of its digits is 864, while the sum is 23.

Adding to 212223313121 its reverse (121313322212), we get a palindrome (333536635333).

Subtracting from 212223313121 its reverse (121313322212), we obtain a palindrome (90909990909).

The spelling of 212223313121 in words is "two hundred twelve billion, two hundred twenty-three million, three hundred thirteen thousand, one hundred twenty-one".