21201110112211 has 8 divisors (see below), whose sum is σ = 21697721127104. Its totient is φ = 20704661003880.

The previous prime is 21201110112197. The next prime is 21201110112251. The reversal of 21201110112211 is 11221101110212.

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 21201110112211 - 2³¹ = 21198962628563 is a prime.

It is a super-2 number, since 2×21201110112211² (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 (21201110112251) 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, 40211661 + ... + 40735486.

It is an arithmetic number, because the mean of its divisors is an integer number (2712215140888).

Almost surely, 2^{21201110112211} is an apocalyptic number.

21201110112211 is a deficient number, since it is larger than the sum of its proper divisors (496611014893).

21201110112211 is an equidigital number, since it uses as much as digits as its factorization.

21201110112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80953281.

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

Adding to 21201110112211 its reverse (11221101110212), we get a palindrome (32422211222423).

The spelling of 21201110112211 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, one hundred twelve thousand, two hundred eleven".