21222210201 has 8 divisors (see below), whose sum is σ = 28465719744. Its totient is φ = 14063420400.

The previous prime is 21222210197. The next prime is 21222210221. The reversal of 21222210201 is 10201222212.

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

It is not a de Polignac number, because 21222210201 - 2² = 21222210197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222210221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21179350 + ... + 21180351.

It is an arithmetic number, because the mean of its divisors is an integer number (3558214968).

Almost surely, 2^21222210201 is an apocalyptic number.

It is an amenable number.

21222210201 is a deficient number, since it is larger than the sum of its proper divisors (7243509543).

21222210201 is a wasteful number, since it uses less digits than its factorization.

21222210201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42359871.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21222210201 its reverse (10201222212), we get a palindrome (31423432413).

The spelling of 21222210201 in words is "twenty-one billion, two hundred twenty-two million, two hundred ten thousand, two hundred one".