11012121201121 has 4 divisors (see below), whose sum is σ = 11135852900100. Its totient is φ = 10888389502144.

The previous prime is 11012121201113. The next prime is 11012121201161. The reversal of 11012121201121 is 12110212121011.

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 1208559429025 + 9803561772096 = 1099345^2 + 3131064^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012121201121 - 2³ = 11012121201113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11012121201095 and 11012121201104.

It is not an unprimeable number, because it can be changed into a prime (11012121201161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61865849356 + ... + 61865849533.

It is an arithmetic number, because the mean of its divisors is an integer number (2783963225025).

Almost surely, 2^{11012121201121} is an apocalyptic number.

It is an amenable number.

11012121201121 is a deficient number, since it is larger than the sum of its proper divisors (123731698979).

11012121201121 is an equidigital number, since it uses as much as digits as its factorization.

11012121201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123731698978.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11012121201121 its reverse (12110212121011), we get a palindrome (23122333322132).

The spelling of 11012121201121 in words is "eleven trillion, twelve billion, one hundred twenty-one million, two hundred one thousand, one hundred twenty-one".