21220112110011 has 8 divisors (see below), whose sum is σ = 28293624597840. Its totient is φ = 14146670514432.

The previous prime is 21220112109971. The next prime is 21220112110031. The reversal of 21220112110011 is 11001121102212.

It is a happy number.

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

It is not a de Polignac number, because 21220112110011 - 2²¹ = 21220110012859 is a prime.

It is a super-2 number, since 2×21220112110011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21220112110031) 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, 17020650 + ... + 18224783.

It is an arithmetic number, because the mean of its divisors is an integer number (3536703074730).

Almost surely, 2^{21220112110011} is an apocalyptic number.

21220112110011 is a deficient number, since it is larger than the sum of its proper divisors (7073512487829).

21220112110011 is a wasteful number, since it uses less digits than its factorization.

21220112110011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35446125.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21220112110011 its reverse (11001121102212), we get a palindrome (32221233212223).

The spelling of 21220112110011 in words is "twenty-one trillion, two hundred twenty billion, one hundred twelve million, one hundred ten thousand, eleven".