21102001222001 has 8 divisors (see below), whose sum is σ = 24421845899520. Its totient is φ = 17858474813088.

The previous prime is 21102001221991. The next prime is 21102001222019. The reversal of 21102001222001 is 10022210020112.

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

It is not a de Polignac number, because 21102001222001 - 2³⁰ = 21100927480177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102001222021) 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, 19079566556 + ... + 19079567661.

It is an arithmetic number, because the mean of its divisors is an integer number (3052730737440).

Almost surely, 2^{21102001222001} is an apocalyptic number.

It is an amenable number.

21102001222001 is a deficient number, since it is larger than the sum of its proper divisors (3319844677519).

21102001222001 is an equidigital number, since it uses as much as digits as its factorization.

21102001222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38159134303.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21102001222001 its reverse (10022210020112), we get a palindrome (31124211242113).

The spelling of 21102001222001 in words is "twenty-one trillion, one hundred two billion, one million, two hundred twenty-two thousand, one".