21202212322 has 4 divisors (see below), whose sum is σ = 31803318486. Its totient is φ = 10601106160.

The previous prime is 21202212307. The next prime is 21202212331. The reversal of 21202212322 is 22321220212.

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., 20606315401 + 595896921 = 143549^2 + 24411^2 .

It is a super-3 number, since 3×21202212322³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21202212322.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300553079 + ... + 5300553082.

Almost surely, 2^21202212322 is an apocalyptic number.

21202212322 is a deficient number, since it is larger than the sum of its proper divisors (10601106164).

21202212322 is a wasteful number, since it uses less digits than its factorization.

21202212322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10601106163.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21202212322 its reverse (22321220212), we get a palindrome (43523432534).

The spelling of 21202212322 in words is "twenty-one billion, two hundred two million, two hundred twelve thousand, three hundred twenty-two".