222000120000221 has 4 divisors (see below), whose sum is σ = 224494503371100. Its totient is φ = 219505736629344.

The previous prime is 222000120000193. The next prime is 222000120000227. The reversal of 222000120000221 is 122000021000222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119237904391321 + 102762215608900 = 10919611^2 + 10137170^2 .

It is a cyclic number.

It is not a de Polignac number, because 222000120000221 - 2⁶ = 222000120000157 is a prime.

It is a super-2 number, since 2×222000120000221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222000120000196 and 222000120000205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222000120000227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1247191685306 + ... + 1247191685483.

It is an arithmetic number, because the mean of its divisors is an integer number (56123625842775).

Almost surely, 2^{222000120000221} is an apocalyptic number.

It is an amenable number.

222000120000221 is a deficient number, since it is larger than the sum of its proper divisors (2494383370879).

222000120000221 is an equidigital number, since it uses as much as digits as its factorization.

222000120000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494383370878.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 222000120000221 its reverse (122000021000222), we get a palindrome (344000141000443).

The spelling of 222000120000221 in words is "two hundred twenty-two trillion, one hundred twenty million, two hundred twenty-one", and thus it is an aban number.