11111200212121 has 8 divisors (see below), whose sum is σ = 11278299555360. Its totient is φ = 10945307362752.

The previous prime is 11111200212107. The next prime is 11111200212157. The reversal of 11111200212121 is 12121200211111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11111200212121 - 2²³ = 11111191823513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111200212095 and 11111200212104.

It is not an unprimeable number, because it can be changed into a prime (11111200212221) 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 7 ways as a sum of consecutive naturals, for example, 301604911 + ... + 301641748.

It is an arithmetic number, because the mean of its divisors is an integer number (1409787444420).

Almost surely, 2^{11111200212121} is an apocalyptic number.

It is an amenable number.

11111200212121 is a deficient number, since it is larger than the sum of its proper divisors (167099343239).

11111200212121 is a wasteful number, since it uses less digits than its factorization.

11111200212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603246935.

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

Adding to 11111200212121 its reverse (12121200211111), we get a palindrome (23232400423232).

The spelling of 11111200212121 in words is "eleven trillion, one hundred eleven billion, two hundred million, two hundred twelve thousand, one hundred twenty-one".