21221432322 has 32 divisors (see below), whose sum is σ = 42729928704. Its totient is φ = 7026114000.

The previous prime is 21221432303. The next prime is 21221432371. The reversal of 21221432322 is 22323412212.

It is a junction number, because it is equal to n+sod(n) for n = 21221432292 and 21221432301.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 568947 + ... + 605097.

It is an arithmetic number, because the mean of its divisors is an integer number (1335310272).

Almost surely, 2^21221432322 is an apocalyptic number.

21221432322 is an abundant number, since it is smaller than the sum of its proper divisors (21508496382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21221432322 is a wasteful number, since it uses less digits than its factorization.

21221432322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36814.

The product of its digits is 2304, while the sum is 24.

Adding to 21221432322 its reverse (22323412212), we get a palindrome (43544844534).

The spelling of 21221432322 in words is "twenty-one billion, two hundred twenty-one million, four hundred thirty-two thousand, three hundred twenty-two".