21120220222011 has 40 divisors (see below), whose sum is σ = 31642074447984. Its totient is φ = 14039044208640.

The previous prime is 21120220221907. The next prime is 21120220222061. The reversal of 21120220222011 is 11022202202112.

It is a happy number.

21120220222011 is a `hidden beast` number, since 211 + 2 + 0 + 220 + 2 + 220 + 11 = 666.

It is not a de Polignac number, because 21120220222011 - 2¹¹ = 21120220219963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120220222061) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 432616275 + ... + 432665091.

Almost surely, 2^{21120220222011} is an apocalyptic number.

21120220222011 is a deficient number, since it is larger than the sum of its proper divisors (10521854225973).

21120220222011 is a wasteful number, since it uses less digits than its factorization.

21120220222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64313 (or 64304 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21120220222011 its reverse (11022202202112), we get a palindrome (32142422424123).

The spelling of 21120220222011 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty million, two hundred twenty-two thousand, eleven".