21222012011011 has 6 divisors (see below), whose sum is σ = 24686830298580. Its totient is φ = 18190296009396.

The previous prime is 21222012010987. The next prime is 21222012011059. The reversal of 21222012011011 is 11011021022212.

It is not a de Polignac number, because 21222012011011 - 2¹¹ = 21222012008963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222012011071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216551142921 + ... + 216551143018.

It is an arithmetic number, because the mean of its divisors is an integer number (4114471716430).

Almost surely, 2^{21222012011011} is an apocalyptic number.

21222012011011 is a deficient number, since it is larger than the sum of its proper divisors (3464818287569).

21222012011011 is an equidigital number, since it uses as much as digits as its factorization.

21222012011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433102285953 (or 433102285946 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21222012011011 its reverse (11011021022212), we get a palindrome (32233033033223).

The spelling of 21222012011011 in words is "twenty-one trillion, two hundred twenty-two billion, twelve million, eleven thousand, eleven".