21121220002201 has 8 divisors (see below), whose sum is σ = 23318937309024. Its totient is φ = 18969770428320.

The previous prime is 21121220002199. The next prime is 21121220002237. The reversal of 21121220002201 is 10220002212112.

It is a happy number.

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 21121220002201 - 2¹ = 21121220002199 is a prime.

It is a super-2 number, since 2×21121220002201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21121220002271) 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, 11566932276 + ... + 11566934101.

It is an arithmetic number, because the mean of its divisors is an integer number (2914867163628).

Almost surely, 2^{21121220002201} is an apocalyptic number.

It is an amenable number.

21121220002201 is a deficient number, since it is larger than the sum of its proper divisors (2197717306823).

21121220002201 is a wasteful number, since it uses less digits than its factorization.

21121220002201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23133866471.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21121220002201 its reverse (10220002212112), we get a palindrome (31341222214313).

The spelling of 21121220002201 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, two thousand, two hundred one".