222111201010221 has 6 divisors (see below), whose sum is σ = 320827290348110. Its totient is φ = 148074134006808.

The previous prime is 222111201010211. The next prime is 222111201010277. The reversal of 222111201010221 is 122010102111222.

222111201010221 is a `hidden beast` number, since 2 + 221 + 1 + 120 + 101 + 0 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 207702458076996 + 14408742933225 = 14411886^2 + 3795885^2 .

It is not a de Polignac number, because 222111201010221 - 2⁷ = 222111201010093 is a prime.

It is a super-2 number, since 2×222111201010221² (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 = 222111201010194 and 222111201010203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222111201010211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12339511167226 + ... + 12339511167243.

Almost surely, 2^{222111201010221} is an apocalyptic number.

It is an amenable number.

222111201010221 is a deficient number, since it is larger than the sum of its proper divisors (98716089337889).

222111201010221 is a wasteful number, since it uses less digits than its factorization.

222111201010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24679022334475 (or 24679022334472 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 222111201010221 its reverse (122010102111222), we get a palindrome (344121303121443).

The spelling of 222111201010221 in words is "two hundred twenty-two trillion, one hundred eleven billion, two hundred one million, ten thousand, two hundred twenty-one".