201221120111122 has 16 divisors (see below), whose sum is σ = 308107362621312. Its totient is φ = 98536026021840.

The previous prime is 201221120111107. The next prime is 201221120111129. The reversal of 201221120111122 is 221111021122102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 201221120111122.

It is not an unprimeable number, because it can be changed into a prime (201221120111129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4340006154 + ... + 4340052517.

It is an arithmetic number, because the mean of its divisors is an integer number (19256710163832).

Almost surely, 2^{201221120111122} is an apocalyptic number.

201221120111122 is a deficient number, since it is larger than the sum of its proper divisors (106886242510190).

201221120111122 is a wasteful number, since it uses less digits than its factorization.

201221120111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8680058913.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 201221120111122 its reverse (221111021122102), we get a palindrome (422332141233224).

The spelling of 201221120111122 in words is "two hundred one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred eleven thousand, one hundred twenty-two".