17122121211121 has 16 divisors (see below), whose sum is σ = 17756823913920. Its totient is φ = 16496601428160.

The previous prime is 17122121211023. The next prime is 17122121211137. The reversal of 17122121211121 is 12111212122171.

It is a cyclic number.

It is not a de Polignac number, because 17122121211121 - 2¹³ = 17122121202929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17122121211821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8335591 + ... + 10184611.

It is an arithmetic number, because the mean of its divisors is an integer number (1109801494620).

Almost surely, 2^{17122121211121} is an apocalyptic number.

It is an amenable number.

17122121211121 is a deficient number, since it is larger than the sum of its proper divisors (634702702799).

17122121211121 is a wasteful number, since it uses less digits than its factorization.

17122121211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851504.

The product of its digits is 224, while the sum is 25.

Adding to 17122121211121 its reverse (12111212122171), we get a palindrome (29233333333292).

The spelling of 17122121211121 in words is "seventeen trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, one hundred twenty-one".