21120222011 has 12 divisors (see below), whose sum is σ = 24574308768. Its totient is φ = 18098709552.

The previous prime is 21120221987. The next prime is 21120222023. The reversal of 21120222011 is 11022202112.

It is not a de Polignac number, because 21120222011 - 2¹⁰ = 21120220987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120221011) 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 11 ways as a sum of consecutive naturals, for example, 164030 + ... + 262956.

It is an arithmetic number, because the mean of its divisors is an integer number (2047859064).

Almost surely, 2^21120222011 is an apocalyptic number.

21120222011 is a deficient number, since it is larger than the sum of its proper divisors (3454086757).

21120222011 is an equidigital number, since it uses as much as digits as its factorization.

21120222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103298 (or 103291 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21120222011 its reverse (11022202112), we get a palindrome (32142424123).

The spelling of 21120222011 in words is "twenty-one billion, one hundred twenty million, two hundred twenty-two thousand, eleven".