21112012222011 has 16 divisors (see below), whose sum is σ = 33116881917600. Its totient is φ = 13246752766464.

The previous prime is 21112012222001. The next prime is 21112012222031. The reversal of 21112012222011 is 11022221021112.

21112012222011 is a `hidden beast` number, since 211 + 1 + 201 + 22 + 220 + 11 = 666.

It is not a de Polignac number, because 21112012222011 - 2⁶ = 21112012221947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112012222001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22997834206 + ... + 22997835123.

It is an arithmetic number, because the mean of its divisors is an integer number (2069805119850).

Almost surely, 2^{21112012222011} is an apocalyptic number.

21112012222011 is a deficient number, since it is larger than the sum of its proper divisors (12004869695589).

21112012222011 is a wasteful number, since it uses less digits than its factorization.

21112012222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45995669355 (or 45995669349 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21112012222011 its reverse (11022221021112), we get a palindrome (32134233243123).

The spelling of 21112012222011 in words is "twenty-one trillion, one hundred twelve billion, twelve million, two hundred twenty-two thousand, eleven".