21212332332322 has 4 divisors (see below), whose sum is σ = 31818498498486. Its totient is φ = 10606166166160.

The previous prime is 21212332332319. The next prime is 21212332332337. The reversal of 21212332332322 is 22323323321212.

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

It can be written as a sum of positive squares in only one way, i.e., 15608038391401 + 5604293940921 = 3950701^2 + 2367339^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5303083083079 + ... + 5303083083082.

Almost surely, 2^{21212332332322} is an apocalyptic number.

21212332332322 is a deficient number, since it is larger than the sum of its proper divisors (10606166166164).

21212332332322 is a wasteful number, since it uses less digits than its factorization.

21212332332322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10606166166163.

The product of its digits is 31104, while the sum is 31.

Adding to 21212332332322 its reverse (22323323321212), we get a palindrome (43535655653534).

The spelling of 21212332332322 in words is "twenty-one trillion, two hundred twelve billion, three hundred thirty-two million, three hundred thirty-two thousand, three hundred twenty-two".