1121201100121 has 4 divisors (see below), whose sum is σ = 1121861797812. Its totient is φ = 1120540402432.

The previous prime is 1121201100101. The next prime is 1121201100209. The reversal of 1121201100121 is 1210011021211.

It is a happy number.

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 1101618176400 + 19582923721 = 1049580^2 + 139939^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121201100121 - 2²⁵ = 1121167545689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121201100101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330346300 + ... + 330349693.

It is an arithmetic number, because the mean of its divisors is an integer number (280465449453).

Almost surely, 2^{1121201100121} is an apocalyptic number.

It is an amenable number.

1121201100121 is a deficient number, since it is larger than the sum of its proper divisors (660697691).

1121201100121 is an equidigital number, since it uses as much as digits as its factorization.

1121201100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660697690.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1121201100121 its reverse (1210011021211), we get a palindrome (2331212121332).

The spelling of 1121201100121 in words is "one trillion, one hundred twenty-one billion, two hundred one million, one hundred thousand, one hundred twenty-one".