12211011100121 has 4 divisors (see below), whose sum is σ = 12256405193700. Its totient is φ = 12165617006544.

The previous prime is 12211011100109. The next prime is 12211011100129. The reversal of 12211011100121 is 12100111011221.

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 7563490032400 + 4647521067721 = 2750180^2 + 2155811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12211011100121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12211011100096 and 12211011100105.

It is not an unprimeable number, because it can be changed into a prime (12211011100129) 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, 22697046386 + ... + 22697046923.

It is an arithmetic number, because the mean of its divisors is an integer number (3064101298425).

Almost surely, 2^{12211011100121} is an apocalyptic number.

It is an amenable number.

12211011100121 is a deficient number, since it is larger than the sum of its proper divisors (45394093579).

12211011100121 is an equidigital number, since it uses as much as digits as its factorization.

12211011100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45394093578.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12211011100121 its reverse (12100111011221), we get a palindrome (24311122111342).

It can be divided in two parts, 12211011100 and 121, that added together give a palindrome (12211011221).

The spelling of 12211011100121 in words is "twelve trillion, two hundred eleven billion, eleven million, one hundred thousand, one hundred twenty-one".