21222210001 has 16 divisors (see below), whose sum is σ = 22035916800. Its totient is φ = 20424690000.

The previous prime is 21222209959. The next prime is 21222210011. The reversal of 21222210001 is 10001222212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21222210001 - 2¹³ = 21222201809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222210011) 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, 1880626 + ... + 1891876.

It is an arithmetic number, because the mean of its divisors is an integer number (1377244800).

Almost surely, 2^21222210001 is an apocalyptic number.

It is an amenable number.

21222210001 is a deficient number, since it is larger than the sum of its proper divisors (813706799).

21222210001 is a wasteful number, since it uses less digits than its factorization.

21222210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11964.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21222210001 its reverse (10001222212), we get a palindrome (31223432213).

The spelling of 21222210001 in words is "twenty-one billion, two hundred twenty-two million, two hundred ten thousand, one".