21212303331322 has 16 divisors (see below), whose sum is σ = 33494106317760. Its totient is φ = 10047634418592.

The previous prime is 21212303331313. The next prime is 21212303331367. The reversal of 21212303331322 is 22313330321212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7000723 + ... + 9562150.

It is an arithmetic number, because the mean of its divisors is an integer number (2093381644860).

Almost surely, 2^{21212303331322} is an apocalyptic number.

21212303331322 is a deficient number, since it is larger than the sum of its proper divisors (12281802986438).

21212303331322 is a wasteful number, since it uses less digits than its factorization.

21212303331322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16596597.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21212303331322 its reverse (22313330321212), we get a palindrome (43525633652534).

The spelling of 21212303331322 in words is "twenty-one trillion, two hundred twelve billion, three hundred three million, three hundred thirty-one thousand, three hundred twenty-two".