21211110112011 has 8 divisors (see below), whose sum is σ = 28639473569280. Its totient is φ = 13961743364712.

The previous prime is 21211110111941. The next prime is 21211110112013. The reversal of 21211110112011 is 11021101111212.

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

It is not a de Polignac number, because 21211110112011 - 2³⁸ = 20936232205067 is a prime.

It is a super-2 number, since 2×21211110112011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21211110112013) 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, 44749177215 + ... + 44749177688.

It is an arithmetic number, because the mean of its divisors is an integer number (3579934196160).

Almost surely, 2^{21211110112011} is an apocalyptic number.

21211110112011 is a deficient number, since it is larger than the sum of its proper divisors (7428363457269).

21211110112011 is an equidigital number, since it uses as much as digits as its factorization.

21211110112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89498354985.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 21211110112011 its reverse (11021101111212), we get a palindrome (32232211223223).

The spelling of 21211110112011 in words is "twenty-one trillion, two hundred eleven billion, one hundred ten million, one hundred twelve thousand, eleven".