11220120000121 has 4 divisors (see below), whose sum is σ = 11220131467252. Its totient is φ = 11220108532992.

The previous prime is 11220120000113. The next prime is 11220120000149. The reversal of 11220120000121 is 12100002102211.

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 5838698995600 + 5381421004521 = 2416340^2 + 2319789^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220120000121 - 2³ = 11220120000113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11220120000181) 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, 4113240 + ... + 6273673.

It is an arithmetic number, because the mean of its divisors is an integer number (2805032866813).

Almost surely, 2^{11220120000121} is an apocalyptic number.

It is an amenable number.

11220120000121 is a deficient number, since it is larger than the sum of its proper divisors (11467131).

11220120000121 is a wasteful number, since it uses less digits than its factorization.

11220120000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11467130.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11220120000121 its reverse (12100002102211), we get a palindrome (23320122102332).

The spelling of 11220120000121 in words is "eleven trillion, two hundred twenty billion, one hundred twenty million, one hundred twenty-one", and thus it is an aban number.