11112100000121 has 4 divisors (see below), whose sum is σ = 11160624454500. Its totient is φ = 11063575545744.

The previous prime is 11112100000097. The next prime is 11112100000139. The reversal of 11112100000121 is 12100000121111.

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 10662347355625 + 449752644496 = 3265325^2 + 670636^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112100000121 - 2²² = 11112095805817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11112100000021) 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, 24262226846 + ... + 24262227303.

It is an arithmetic number, because the mean of its divisors is an integer number (2790156113625).

Almost surely, 2^{11112100000121} is an apocalyptic number.

It is an amenable number.

11112100000121 is a deficient number, since it is larger than the sum of its proper divisors (48524454379).

11112100000121 is an equidigital number, since it uses as much as digits as its factorization.

11112100000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48524454378.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11112100000121 its reverse (12100000121111), we get a palindrome (23212100121232).

It can be divided in two parts, 111 and 12100000121, that multiplied together give a palindrome (1343100013431).

The spelling of 11112100000121 in words is "eleven trillion, one hundred twelve billion, one hundred million, one hundred twenty-one", and thus it is an aban number.