21223422445 has 8 divisors (see below), whose sum is σ = 25601448960. Its totient is φ = 16889843280.

The previous prime is 21223422419. The next prime is 21223422457. The reversal of 21223422445 is 54422432212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21223422445 - 2⁷ = 21223422317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11110785 + ... + 11112694.

It is an arithmetic number, because the mean of its divisors is an integer number (3200181120).

Almost surely, 2^21223422445 is an apocalyptic number.

It is an amenable number.

21223422445 is a deficient number, since it is larger than the sum of its proper divisors (4378026515).

21223422445 is a wasteful number, since it uses less digits than its factorization.

21223422445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22223675.

The product of its digits is 30720, while the sum is 31.

Adding to 21223422445 its reverse (54422432212), we get a palindrome (75645854657).

The spelling of 21223422445 in words is "twenty-one billion, two hundred twenty-three million, four hundred twenty-two thousand, four hundred forty-five".