1233121020121 has 4 divisors (see below), whose sum is σ = 1234124374500. Its totient is φ = 1232117665744.

The previous prime is 1233121020083. The next prime is 1233121020167. The reversal of 1233121020121 is 1210201213321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1228082859721 + 5038160400 = 1108189^2 + 70980^2 .

It is a cyclic number.

It is not a de Polignac number, because 1233121020121 - 2⁹ = 1233121019609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1233121020191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501675346 + ... + 501677803.

It is an arithmetic number, because the mean of its divisors is an integer number (308531093625).

Almost surely, 2^{1233121020121} is an apocalyptic number.

It is an amenable number.

1233121020121 is a deficient number, since it is larger than the sum of its proper divisors (1003354379).

1233121020121 is a wasteful number, since it uses less digits than its factorization.

1233121020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003354378.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1233121020121 its reverse (1210201213321), we get a palindrome (2443322233442).

The spelling of 1233121020121 in words is "one trillion, two hundred thirty-three billion, one hundred twenty-one million, twenty thousand, one hundred twenty-one".