21222133201 has 4 divisors (see below), whose sum is σ = 22339087600. Its totient is φ = 20105178804.

The previous prime is 21222133187. The next prime is 21222133237. The reversal of 21222133201 is 10233122212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21222133201 - 2¹¹ = 21222131153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1116954379 = 21222133201 / (2 + 1 + 2 + 2 + 2 + 1 + 3 + 3 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222133301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558477171 + ... + 558477208.

It is an arithmetic number, because the mean of its divisors is an integer number (5584771900).

Almost surely, 2^21222133201 is an apocalyptic number.

It is an amenable number.

21222133201 is a deficient number, since it is larger than the sum of its proper divisors (1116954399).

21222133201 is a wasteful number, since it uses less digits than its factorization.

21222133201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116954398.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21222133201 its reverse (10233122212), we get a palindrome (31455255413).

The spelling of 21222133201 in words is "twenty-one billion, two hundred twenty-two million, one hundred thirty-three thousand, two hundred one".