201123220112 has 20 divisors (see below), whose sum is σ = 389789328300. Its totient is φ = 100532425728.

The previous prime is 201123220097. The next prime is 201123220117. The reversal of 201123220112 is 211022321102.

It can be written as a sum of positive squares in 2 ways, for example, as 52525305856 + 148597914256 = 229184^2 + 385484^2 .

It is not an unprimeable number, because it can be changed into a prime (201123220117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767113 + ... + 1877480.

It is an arithmetic number, because the mean of its divisors is an integer number (19489466415).

Almost surely, 2^201123220112 is an apocalyptic number.

It is an amenable number.

201123220112 is a deficient number, since it is larger than the sum of its proper divisors (188666108188).

201123220112 is a wasteful number, since it uses less digits than its factorization.

201123220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3648050 (or 3648044 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 201123220112 its reverse (211022321102), we get a palindrome (412145541214).

The spelling of 201123220112 in words is "two hundred one billion, one hundred twenty-three million, two hundred twenty thousand, one hundred twelve".