21022210200021 has 8 divisors (see below), whose sum is σ = 28344553079040. Its totient is φ = 13857337060512.

The previous prime is 21022210199989. The next prime is 21022210200037. The reversal of 21022210200021 is 12000201222012.

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

It is not a de Polignac number, because 21022210200021 - 2⁵ = 21022210199989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022210200421) 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, 39367434565 + ... + 39367435098.

It is an arithmetic number, because the mean of its divisors is an integer number (3543069134880).

Almost surely, 2^{21022210200021} is an apocalyptic number.

It is an amenable number.

21022210200021 is a deficient number, since it is larger than the sum of its proper divisors (7322342879019).

21022210200021 is an equidigital number, since it uses as much as digits as its factorization.

21022210200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78734869755.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21022210200021 its reverse (12000201222012), we get a palindrome (33022411422033).

The spelling of 21022210200021 in words is "twenty-one trillion, twenty-two billion, two hundred ten million, two hundred thousand, twenty-one".