21120222012122 has 12 divisors (see below), whose sum is σ = 32735245254858. Its totient is φ = 10219462263000.

The previous prime is 21120222012119. The next prime is 21120222012139. The reversal of 21120222012122 is 22121022202112.

It can be written as a sum of positive squares in only one way, i.e., 16088594301481 + 5031627710641 = 4011059^2 + 2243129^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21120222012094 and 21120222012103.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5494332629 + ... + 5494336472.

Almost surely, 2^{21120222012122} is an apocalyptic number.

21120222012122 is a deficient number, since it is larger than the sum of its proper divisors (11615023242736).

21120222012122 is a wasteful number, since it uses less digits than its factorization.

21120222012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10988669165 (or 10988669134 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21120222012122 its reverse (22121022202112), we get a palindrome (43241244214234).

The spelling of 21120222012122 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-two million, twelve thousand, one hundred twenty-two".