22001322421 has 16 divisors (see below), whose sum is σ = 24294428928. Its totient is φ = 19797480000.

The previous prime is 22001322397. The next prime is 22001322457. The reversal of 22001322421 is 12422310022.

It is a cyclic number.

It is not a de Polignac number, because 22001322421 - 2⁵ = 22001322389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001322481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81631 + ... + 225091.

It is an arithmetic number, because the mean of its divisors is an integer number (1518401808).

Almost surely, 2^22001322421 is an apocalyptic number.

It is an amenable number.

22001322421 is a deficient number, since it is larger than the sum of its proper divisors (2293106507).

22001322421 is a wasteful number, since it uses less digits than its factorization.

22001322421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143772.

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

Adding to 22001322421 its reverse (12422310022), we get a palindrome (34423632443).

The spelling of 22001322421 in words is "twenty-two billion, one million, three hundred twenty-two thousand, four hundred twenty-one".