21222010022121 has 24 divisors (see below), whose sum is σ = 32504713469280. Its totient is φ = 13296274924416.

The previous prime is 21222010022111. The next prime is 21222010022231. The reversal of 21222010022121 is 12122001022212.

It is a happy number.

21222010022121 is a `hidden beast` number, since 212 + 220 + 10 + 0 + 221 + 2 + 1 = 666.

It is not a de Polignac number, because 21222010022121 - 2¹⁵ = 21222009989353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21222010022094 and 21222010022103.

It is not an unprimeable number, because it can be changed into a prime (21222010022111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101437191 + ... + 101646188.

It is an arithmetic number, because the mean of its divisors is an integer number (1354363061220).

Almost surely, 2^{21222010022121} is an apocalyptic number.

It is an amenable number.

21222010022121 is a deficient number, since it is larger than the sum of its proper divisors (11282703447159).

21222010022121 is a wasteful number, since it uses less digits than its factorization.

21222010022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203084085 (or 203084082 counting only the distinct ones).

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

Adding to 21222010022121 its reverse (12122001022212), we get a palindrome (33344011044333).

The spelling of 21222010022121 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, twenty-two thousand, one hundred twenty-one".