21102220012001 has 4 divisors (see below), whose sum is σ = 21102363059904. Its totient is φ = 21102076964100.

The previous prime is 21102220011997. The next prime is 21102220012019. The reversal of 21102220012001 is 10021002220112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21102220012001 - 2² = 21102220011997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102220015001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71302445 + ... + 71597786.

It is an arithmetic number, because the mean of its divisors is an integer number (5275590764976).

Almost surely, 2^{21102220012001} is an apocalyptic number.

It is an amenable number.

21102220012001 is a deficient number, since it is larger than the sum of its proper divisors (143047903).

21102220012001 is a wasteful number, since it uses less digits than its factorization.

21102220012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143047902.

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

Adding to 21102220012001 its reverse (10021002220112), we get a palindrome (31123222232113).

The spelling of 21102220012001 in words is "twenty-one trillion, one hundred two billion, two hundred twenty million, twelve thousand, one".