21220110002001 has 8 divisors (see below), whose sum is σ = 28330272567520. Its totient is φ = 14128343718912.

The previous prime is 21220110001969. The next prime is 21220110002051. The reversal of 21220110002001 is 10020001102212.

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

It is not a de Polignac number, because 21220110002001 - 2⁵ = 21220110001969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220110002051) 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, 4599067915 + ... + 4599072528.

It is an arithmetic number, because the mean of its divisors is an integer number (3541284070940).

Almost surely, 2^{21220110002001} is an apocalyptic number.

It is an amenable number.

21220110002001 is a deficient number, since it is larger than the sum of its proper divisors (7110162565519).

21220110002001 is an equidigital number, since it uses as much as digits as its factorization.

21220110002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9198141215.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21220110002001 its reverse (10020001102212), we get a palindrome (31240111104213).

The spelling of 21220110002001 in words is "twenty-one trillion, two hundred twenty billion, one hundred ten million, two thousand, one".