21221112002201 has 8 divisors (see below), whose sum is σ = 21905725636608. Its totient is φ = 20536502220000.

The previous prime is 21221112002173. The next prime is 21221112002227. The reversal of 21221112002201 is 10220021112212.

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 21221112002201 - 2²⁶ = 21221044893337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21221112002201.

It is not an unprimeable number, because it can be changed into a prime (21221112002801) 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, 13848296 + ... + 15304166.

It is an arithmetic number, because the mean of its divisors is an integer number (2738215704576).

Almost surely, 2^{21221112002201} is an apocalyptic number.

It is an amenable number.

21221112002201 is a deficient number, since it is larger than the sum of its proper divisors (684613634407).

21221112002201 is a wasteful number, since it uses less digits than its factorization.

21221112002201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926103.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221112002201 its reverse (10220021112212), we get a palindrome (31441133114413).

The spelling of 21221112002201 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, two thousand, two hundred one".