21022222001121 has 48 divisors (see below), whose sum is σ = 33897265459200. Its totient is φ = 12444088376160.

The previous prime is 21022222001101. The next prime is 21022222001251. The reversal of 21022222001121 is 12110022222012.

It is a happy number.

21022222001121 is a `hidden beast` number, since 210 + 2 + 222 + 200 + 11 + 21 = 666.

It is not a de Polignac number, because 21022222001121 - 2⁹ = 21022222000609 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21022222001094 and 21022222001103.

It is not an unprimeable number, because it can be changed into a prime (21022222001101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 270702120 + ... + 270779766.

It is an arithmetic number, because the mean of its divisors is an integer number (706193030400).

Almost surely, 2^{21022222001121} is an apocalyptic number.

It is an amenable number.

21022222001121 is a deficient number, since it is larger than the sum of its proper divisors (12875043458079).

21022222001121 is a wasteful number, since it uses less digits than its factorization.

21022222001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141306 (or 141303 counting only the distinct ones).

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

Adding to 21022222001121 its reverse (12110022222012), we get a palindrome (33132244223133).

The spelling of 21022222001121 in words is "twenty-one trillion, twenty-two billion, two hundred twenty-two million, one thousand, one hundred twenty-one".