12011100220121 has 4 divisors (see below), whose sum is σ = 12073333900212. Its totient is φ = 11948866540032.

The previous prime is 12011100220073. The next prime is 12011100220127. The reversal of 12011100220121 is 12102200111021.

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 2362553443600 + 9648546776521 = 1537060^2 + 3106211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12011100220121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12011100220096 and 12011100220105.

It is not an unprimeable number, because it can be changed into a prime (12011100220127) 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, 31116839756 + ... + 31116840141.

It is an arithmetic number, because the mean of its divisors is an integer number (3018333475053).

Almost surely, 2^{12011100220121} is an apocalyptic number.

It is an amenable number.

12011100220121 is a deficient number, since it is larger than the sum of its proper divisors (62233680091).

12011100220121 is an equidigital number, since it uses as much as digits as its factorization.

12011100220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62233680090.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12011100220121 its reverse (12102200111021), we get a palindrome (24113300331142).

The spelling of 12011100220121 in words is "twelve trillion, eleven billion, one hundred million, two hundred twenty thousand, one hundred twenty-one".