21020020022201 has 8 divisors (see below), whose sum is σ = 21319268630400. Its totient is φ = 20720860080480.

The previous prime is 21020020022171. The next prime is 21020020022251. The reversal of 21020020022201 is 10222002002012.

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 21020020022201 - 2⁶ = 21020020022137 is a prime.

It is a super-3 number, since 3×21020020022201³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020020022251) 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, 21689036 + ... + 22637453.

It is an arithmetic number, because the mean of its divisors is an integer number (2664908578800).

Almost surely, 2^{21020020022201} is an apocalyptic number.

It is an amenable number.

21020020022201 is a deficient number, since it is larger than the sum of its proper divisors (299248608199).

21020020022201 is an equidigital number, since it uses as much as digits as its factorization.

21020020022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44333239.

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

Adding to 21020020022201 its reverse (10222002002012), we get a palindrome (31242022024213).

The spelling of 21020020022201 in words is "twenty-one trillion, twenty billion, twenty million, twenty-two thousand, two hundred one".