1011220000121 has 4 divisors (see below), whose sum is σ = 1011230222244. Its totient is φ = 1011209778000.

The previous prime is 1011220000117. The next prime is 1011220000159. The reversal of 1011220000121 is 1210000221101.

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 833925108025 + 177294892096 = 913195^2 + 421064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011220000121 - 2² = 1011220000117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011220000181) 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, 4961210 + ... + 5161011.

It is an arithmetic number, because the mean of its divisors is an integer number (252807555561).

Almost surely, 2^{1011220000121} is an apocalyptic number.

It is an amenable number.

1011220000121 is a deficient number, since it is larger than the sum of its proper divisors (10222123).

1011220000121 is an equidigital number, since it uses as much as digits as its factorization.

1011220000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10222122.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1011220000121 its reverse (1210000221101), we get a palindrome (2221220221222).

The spelling of 1011220000121 in words is "one trillion, eleven billion, two hundred twenty million, one hundred twenty-one", and thus it is an aban number.