21122112220011 has 20 divisors (see below), whose sum is σ = 34421219915544. Its totient is φ = 12801280132800.

The previous prime is 21122112220009. The next prime is 21122112220039. The reversal of 21122112220011 is 11002221122112.

21122112220011 is a `hidden beast` number, since 211 + 221 + 1 + 2 + 220 + 0 + 11 = 666.

It is not a de Polignac number, because 21122112220011 - 2¹ = 21122112220009 is a prime.

It is a super-2 number, since 2×21122112220011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122112221011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11853036270 + ... + 11853038051.

Almost surely, 2^{21122112220011} is an apocalyptic number.

21122112220011 is a deficient number, since it is larger than the sum of its proper divisors (13299107695533).

21122112220011 is a wasteful number, since it uses less digits than its factorization.

21122112220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23706074344 (or 23706074335 counting only the distinct ones).

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

Adding to 21122112220011 its reverse (11002221122112), we get a palindrome (32124333342123).

The spelling of 21122112220011 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twelve million, two hundred twenty thousand, eleven".