21222010001 has 8 divisors (see below), whose sum is σ = 22146649344. Its totient is φ = 20297532640.

The previous prime is 21222009989. The next prime is 21222010003. The reversal of 21222010001 is 10001022212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21222010001 - 2²⁶ = 21154901137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222010003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281960 + ... + 349206.

It is an arithmetic number, because the mean of its divisors is an integer number (2768331168).

Almost surely, 2^21222010001 is an apocalyptic number.

It is an amenable number.

21222010001 is a deficient number, since it is larger than the sum of its proper divisors (924639343).

21222010001 is a wasteful number, since it uses less digits than its factorization.

21222010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80991.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21222010001 its reverse (10001022212), we get a palindrome (31223032213).

The spelling of 21222010001 in words is "twenty-one billion, two hundred twenty-two million, ten thousand, one".