212223102121 has 4 divisors (see below), whose sum is σ = 212275416532. Its totient is φ = 212170787712.

The previous prime is 212223102071. The next prime is 212223102149. The reversal of 212223102121 is 121201322212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 154413632025 + 57809470096 = 392955^2 + 240436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212223102121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212223100121) 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, 26151120 + ... + 26159233.

It is an arithmetic number, because the mean of its divisors is an integer number (53068854133).

Almost surely, 2^212223102121 is an apocalyptic number.

It is an amenable number.

212223102121 is a deficient number, since it is larger than the sum of its proper divisors (52314411).

212223102121 is an equidigital number, since it uses as much as digits as its factorization.

212223102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52314410.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212223102121 its reverse (121201322212), we get a palindrome (333424424333).

The spelling of 212223102121 in words is "two hundred twelve billion, two hundred twenty-three million, one hundred two thousand, one hundred twenty-one".