21222102021121 has 16 divisors (see below), whose sum is σ = 21525680275200. Its totient is φ = 20919417667200.

The previous prime is 21222102021017. The next prime is 21222102021137. The reversal of 21222102021121 is 12112020122212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222102021121 is a prime.

It is a super-2 number, since 2×21222102021121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222102021181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167447386 + ... + 167574076.

It is an arithmetic number, because the mean of its divisors is an integer number (1345355017200).

Almost surely, 2^{21222102021121} is an apocalyptic number.

It is an amenable number.

21222102021121 is a deficient number, since it is larger than the sum of its proper divisors (303578254079).

21222102021121 is a wasteful number, since it uses less digits than its factorization.

21222102021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130200.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21222102021121 its reverse (12112020122212), we get a palindrome (33334122143333).

The spelling of 21222102021121 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred two million, twenty-one thousand, one hundred twenty-one".