201112122122 has 4 divisors (see below), whose sum is σ = 301668183186. Its totient is φ = 100556061060.

The previous prime is 201112122091. The next prime is 201112122139. The reversal of 201112122122 is 221221211102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 196400535241 + 4711586881 = 443171^2 + 68641^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 201112122122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50278030529 + ... + 50278030532.

Almost surely, 2^201112122122 is an apocalyptic number.

201112122122 is a deficient number, since it is larger than the sum of its proper divisors (100556061064).

201112122122 is a wasteful number, since it uses less digits than its factorization.

201112122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100556061063.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201112122122 its reverse (221221211102), we get a palindrome (422333333224).

The spelling of 201112122122 in words is "two hundred one billion, one hundred twelve million, one hundred twenty-two thousand, one hundred twenty-two".