21220022001 has 8 divisors (see below), whose sum is σ = 28310975424. Its totient is φ = 14137874960.

The previous prime is 21220021987. The next prime is 21220022023. The reversal of 21220022001 is 10022002212.

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 21220022001 - 2¹⁸ = 21219759857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220020001) 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, 2195970 + ... + 2205611.

It is an arithmetic number, because the mean of its divisors is an integer number (3538871928).

Almost surely, 2^21220022001 is an apocalyptic number.

It is an amenable number.

21220022001 is a deficient number, since it is larger than the sum of its proper divisors (7090953423).

21220022001 is a wasteful number, since it uses less digits than its factorization.

21220022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4403191.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21220022001 its reverse (10022002212), we get a palindrome (31242024213).

The spelling of 21220022001 in words is "twenty-one billion, two hundred twenty million, twenty-two thousand, one".