21200212222001 has 8 divisors (see below), whose sum is σ = 21203655463200. Its totient is φ = 21196769260320.

The previous prime is 21200212221989. The next prime is 21200212222099. The reversal of 21200212222001 is 10022221200212.

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 21200212222001 - 2²² = 21200208027697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200212222901) 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, 192182981 + ... + 192293261.

It is an arithmetic number, because the mean of its divisors is an integer number (2650456932900).

Almost surely, 2^{21200212222001} is an apocalyptic number.

It is an amenable number.

21200212222001 is a deficient number, since it is larger than the sum of its proper divisors (3443241199).

21200212222001 is a wasteful number, since it uses less digits than its factorization.

21200212222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139759.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21200212222001 its reverse (10022221200212), we get a palindrome (31222433422213).

The spelling of 21200212222001 in words is "twenty-one trillion, two hundred billion, two hundred twelve million, two hundred twenty-two thousand, one".