21201133422 has 32 divisors (see below), whose sum is σ = 49769459712. Its totient is φ = 5893750944.

The previous prime is 21201133391. The next prime is 21201133433. The reversal of 21201133422 is 22433110212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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, 6819918 + ... + 6823025.

It is an arithmetic number, because the mean of its divisors is an integer number (1555295616).

Almost surely, 2^21201133422 is an apocalyptic number.

21201133422 is an abundant number, since it is smaller than the sum of its proper divisors (28568326290).

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

21201133422 is a wasteful number, since it uses less digits than its factorization.

21201133422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13642992.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21201133422 its reverse (22433110212), we get a palindrome (43634243634).

The spelling of 21201133422 in words is "twenty-one billion, two hundred one million, one hundred thirty-three thousand, four hundred twenty-two".