21222220001 has 8 divisors (see below), whose sum is σ = 21274032000. Its totient is φ = 21170446128.

The previous prime is 21222219983. The next prime is 21222220009. The reversal of 21222220001 is 10002222212.

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 21222220001 - 2²⁶ = 21155111137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222220009) 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, 1327880 + ... + 1343766.

It is an arithmetic number, because the mean of its divisors is an integer number (2659254000).

Almost surely, 2^21222220001 is an apocalyptic number.

It is an amenable number.

21222220001 is a deficient number, since it is larger than the sum of its proper divisors (51811999).

21222220001 is a wasteful number, since it uses less digits than its factorization.

21222220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19063.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21222220001 its reverse (10002222212), we get a palindrome (31224442213).

The spelling of 21222220001 in words is "twenty-one billion, two hundred twenty-two million, two hundred twenty thousand, one".