222111212210210 has 16 divisors (see below), whose sum is σ = 423317839742136. Its totient is φ = 83618338714368.

The previous prime is 222111212210183. The next prime is 222111212210311. The reversal of 222111212210210 is 12012212111222.

It can be written as a sum of positive squares in 4 ways, for example, as 172369774487089 + 49741437723121 = 13128967^2 + 7052761^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653268271037 + ... + 653268271376.

Almost surely, 2^{222111212210210} is an apocalyptic number.

222111212210210 is a deficient number, since it is larger than the sum of its proper divisors (201206627531926).

222111212210210 is a wasteful number, since it uses less digits than its factorization.

222111212210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306536542437.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 222111212210210 its reverse (12012212111222), we get a palindrome (234123424321432).

The spelling of 222111212210210 in words is "two hundred twenty-two trillion, one hundred eleven billion, two hundred twelve million, two hundred ten thousand, two hundred ten".