222220112221221 has 16 divisors (see below), whose sum is σ = 299066418653184. Its totient is φ = 146760309169904.

The previous prime is 222220112221213. The next prime is 222220112221229. The reversal of 222220112221221 is 122122211022222.

It is a happy number.

222220112221221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (222220112221213) and next prime (222220112221229).

It is a cyclic number.

It is not a de Polignac number, because 222220112221221 - 2³ = 222220112221213 is a prime.

It is a super-2 number, since 2×222220112221221² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222220112221191 and 222220112221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222220112221229) 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, 20835490 + ... + 29640476.

It is an arithmetic number, because the mean of its divisors is an integer number (18691651165824).

Almost surely, 2^{222220112221221} is an apocalyptic number.

It is an amenable number.

222220112221221 is a deficient number, since it is larger than the sum of its proper divisors (76846306431963).

222220112221221 is a wasteful number, since it uses less digits than its factorization.

222220112221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8883720.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 222220112221221 its reverse (122122211022222), we get a palindrome (344342323243443).

The spelling of 222220112221221 in words is "two hundred twenty-two trillion, two hundred twenty billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".