21220222220001 has 24 divisors (see below), whose sum is σ = 35091557044544. Its totient is φ = 12104605098720.

The previous prime is 21220222219997. The next prime is 21220222220089. The reversal of 21220222220001 is 10002222202212.

21220222220001 is a `hidden beast` number, since 2 + 1 + 220 + 222 + 220 + 0 + 0 + 1 = 666.

It is not a de Polignac number, because 21220222220001 - 2² = 21220222219997 is a prime.

It is a super-5 number, since 5×21220222220001⁵ (a number of 68 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (21220222220801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 294910546 + ... + 294982491.

Almost surely, 2^{21220222220001} is an apocalyptic number.

21220222220001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21220222220001 is a deficient number, since it is larger than the sum of its proper divisors (13871334824543).

21220222220001 is a wasteful number, since it uses less digits than its factorization.

21220222220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589893621 (or 589893618 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21220222220001 its reverse (10002222202212), we get a palindrome (31222444422213).

The spelling of 21220222220001 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred twenty thousand, one".