222001120021 has 8 divisors (see below), whose sum is σ = 235725908184. Its totient is φ = 208350320640.

The previous prime is 222001119997. The next prime is 222001120031. The reversal of 222001120021 is 120021100222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 53552439396 + 168448680625 = 231414^2 + 410425^2 .

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 222001120021 - 2²³ = 221992731413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222001119983 and 222001120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222001120031) 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, 18491010 + ... + 18503011.

It is an arithmetic number, because the mean of its divisors is an integer number (29465738523).

Almost surely, 2^222001120021 is an apocalyptic number.

It is an amenable number.

222001120021 is a deficient number, since it is larger than the sum of its proper divisors (13724788163).

222001120021 is a wasteful number, since it uses less digits than its factorization.

222001120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36994391.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 222001120021 its reverse (120021100222), we get a palindrome (342022220243).

The spelling of 222001120021 in words is "two hundred twenty-two billion, one million, one hundred twenty thousand, twenty-one".