1201122122109 has 128 divisors (see below), whose sum is σ = 2167534494720. Its totient is φ = 573648666624.

The previous prime is 1201122122099. The next prime is 1201122122129. The reversal of 1201122122109 is 9012212211021.

It is not a de Polignac number, because 1201122122109 - 2¹¹ = 1201122120061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201122122129) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 15243517 + ... + 15322109.

It is an arithmetic number, because the mean of its divisors is an integer number (16933863240).

Almost surely, 2^{1201122122109} is an apocalyptic number.

It is an amenable number.

1201122122109 is a deficient number, since it is larger than the sum of its proper divisors (966412372611).

1201122122109 is a wasteful number, since it uses less digits than its factorization.

1201122122109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78759.

The product of its (nonzero) digits is 288, while the sum is 24.

It can be divided in two parts, 1201122 and 122109, that added together give a palindrome (1323231).

The spelling of 1201122122109 in words is "one trillion, two hundred one billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred nine".