21213223321322 has 4 divisors (see below), whose sum is σ = 31819834981986. Its totient is φ = 10606611660660.

The previous prime is 21213223321319. The next prime is 21213223321391. The reversal of 21213223321322 is 22312332231212.

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., 19938805853521 + 1274417467801 = 4465289^2 + 1128901^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5303305830329 + ... + 5303305830332.

Almost surely, 2^{21213223321322} is an apocalyptic number.

21213223321322 is a deficient number, since it is larger than the sum of its proper divisors (10606611660664).

21213223321322 is a wasteful number, since it uses less digits than its factorization.

21213223321322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10606611660663.

The product of its digits is 10368, while the sum is 29.

Adding to 21213223321322 its reverse (22312332231212), we get a palindrome (43525555552534).

The spelling of 21213223321322 in words is "twenty-one trillion, two hundred thirteen billion, two hundred twenty-three million, three hundred twenty-one thousand, three hundred twenty-two".