212222132321 has 4 divisors (see below), whose sum is σ = 212359672512. Its totient is φ = 212084592132.

The previous prime is 212222132261. The next prime is 212222132323. The reversal of 212222132321 is 123231222212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212222132321 - 2⁶ = 212222132257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212222132323) 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, 68767781 + ... + 68770866.

It is an arithmetic number, because the mean of its divisors is an integer number (53089918128).

Almost surely, 2^212222132321 is an apocalyptic number.

It is an amenable number.

212222132321 is a deficient number, since it is larger than the sum of its proper divisors (137540191).

212222132321 is a wasteful number, since it uses less digits than its factorization.

212222132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137540190.

The product of its digits is 1152, while the sum is 23.

Adding to 212222132321 its reverse (123231222212), we get a palindrome (335453354533).

The spelling of 212222132321 in words is "two hundred twelve billion, two hundred twenty-two million, one hundred thirty-two thousand, three hundred twenty-one".