21202221022211 has 8 divisors (see below), whose sum is σ = 21526728674304. Its totient is φ = 20877950328840.

The previous prime is 21202221022201. The next prime is 21202221022259. The reversal of 21202221022211 is 11222012220212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202221022211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202221022201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59059355 + ... + 59417268.

It is an arithmetic number, because the mean of its divisors is an integer number (2690841084288).

Almost surely, 2^{21202221022211} is an apocalyptic number.

21202221022211 is a deficient number, since it is larger than the sum of its proper divisors (324507652093).

21202221022211 is a wasteful number, since it uses less digits than its factorization.

21202221022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118479361.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21202221022211 its reverse (11222012220212), we get a palindrome (32424233242423).

The spelling of 21202221022211 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-one million, twenty-two thousand, two hundred eleven".