201111111222222 has 32 divisors (see below), whose sum is σ = 405100272660480. Its totient is φ = 66558530554880.

The previous prime is 201111111222193. The next prime is 201111111222269. The reversal of 201111111222222 is 222222111111102.

201111111222222 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145375758 + ... + 146752625.

It is an arithmetic number, because the mean of its divisors is an integer number (12659383520640).

Almost surely, 2^{201111111222222} is an apocalyptic number.

201111111222222 is an abundant number, since it is smaller than the sum of its proper divisors (203989161438258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201111111222222 is a wasteful number, since it uses less digits than its factorization.

201111111222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292129208.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 201111111222222 its reverse (222222111111102), we get a palindrome (423333222333324).

The spelling of 201111111222222 in words is "two hundred one trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty-two".