75122121211121 has 16 divisors (see below), whose sum is σ = 76455320947200. Its totient is φ = 73797715330560.

The previous prime is 75122121211103. The next prime is 75122121211133. The reversal of 75122121211121 is 12111212122157.

It is a cyclic number.

It is not a de Polignac number, because 75122121211121 - 2²⁶ = 75122054102257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75122121211141) 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, 16853321 + ... + 20839353.

It is an arithmetic number, because the mean of its divisors is an integer number (4778457559200).

Almost surely, 2^{75122121211121} is an apocalyptic number.

It is an amenable number.

75122121211121 is a deficient number, since it is larger than the sum of its proper divisors (1333199736079).

75122121211121 is a wasteful number, since it uses less digits than its factorization.

75122121211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3987136.

The product of its digits is 1120, while the sum is 29.

Adding to 75122121211121 its reverse (12111212122157), we get a palindrome (87233333333278).

The spelling of 75122121211121 in words is "seventy-five trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, one hundred twenty-one".