222200111122221 has 16 divisors (see below), whose sum is σ = 296869845462336. Its totient is φ = 147832139554176.

The previous prime is 222200111122169. The next prime is 222200111122243. The reversal of 222200111122221 is 122221111002222.

It is not a de Polignac number, because 222200111122221 - 2²⁹ = 222199574251309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222200111122271) 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, 27338850 + ... + 34522643.

It is an arithmetic number, because the mean of its divisors is an integer number (18554365341396).

Almost surely, 2^{222200111122221} is an apocalyptic number.

It is an amenable number.

222200111122221 is a deficient number, since it is larger than the sum of its proper divisors (74669734340115).

222200111122221 is a wasteful number, since it uses less digits than its factorization.

222200111122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61863932.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222200111122221 its reverse (122221111002222), we get a palindrome (344421222124443).

The spelling of 222200111122221 in words is "two hundred twenty-two trillion, two hundred billion, one hundred eleven million, one hundred twenty-two thousand, two hundred twenty-one".