21222010120121 has 8 divisors (see below), whose sum is σ = 22346766172800. Its totient is φ = 20098034882640.

The previous prime is 21222010120043. The next prime is 21222010120217. The reversal of 21222010120121 is 12102101022212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21222010120121 - 2²⁶ = 21221943011257 is a prime.

It is a super-3 number, since 3×21222010120121³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21222010120121.

It is not an unprimeable number, because it can be changed into a prime (21222010120621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195148001 + ... + 195256718.

It is an arithmetic number, because the mean of its divisors is an integer number (2793345771600).

Almost surely, 2^{21222010120121} is an apocalyptic number.

It is an amenable number.

21222010120121 is a deficient number, since it is larger than the sum of its proper divisors (1124756052679).

21222010120121 is a wasteful number, since it uses less digits than its factorization.

21222010120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390407599.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21222010120121 its reverse (12102101022212), we get a palindrome (33324111142333).

The spelling of 21222010120121 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, one hundred twenty thousand, one hundred twenty-one".