21122201112211 has 4 divisors (see below), whose sum is σ = 21122410036000. Its totient is φ = 21121992188424.

The previous prime is 21122201112197. The next prime is 21122201112217. The reversal of 21122201112211 is 11221110222112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21122201112211 - 2³⁷ = 20984762158739 is a prime.

It is a super-2 number, since 2×21122201112211² (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 (21122201112217) 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, 104310171 + ... + 104512468.

It is an arithmetic number, because the mean of its divisors is an integer number (5280602509000).

Almost surely, 2^{21122201112211} is an apocalyptic number.

21122201112211 is a deficient number, since it is larger than the sum of its proper divisors (208923789).

21122201112211 is a wasteful number, since it uses less digits than its factorization.

21122201112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208923788.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21122201112211 its reverse (11221110222112), we get a palindrome (32343311334323).

The spelling of 21122201112211 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred one million, one hundred twelve thousand, two hundred eleven".