12011220213121 has 8 divisors (see below), whose sum is σ = 12439898962920. Its totient is φ = 11583508046208.

The previous prime is 12011220213077. The next prime is 12011220213151. The reversal of 12011220213121 is 12131202211021.

It can be written as a sum of positive squares in 4 ways, for example, as 4899205962225 + 7112014250896 = 2213415^2 + 2666836^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12011220213121 - 2²⁷ = 12011085995393 is a prime.

It is a super-2 number, since 2×12011220213121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011220213151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241620426 + ... + 241670131.

It is an arithmetic number, because the mean of its divisors is an integer number (1554987370365).

Almost surely, 2^{12011220213121} is an apocalyptic number.

It is an amenable number.

12011220213121 is a deficient number, since it is larger than the sum of its proper divisors (428678749799).

12011220213121 is an equidigital number, since it uses as much as digits as its factorization.

12011220213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483291443.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 12011220213121 its reverse (12131202211021), we get a palindrome (24142422424142).

The spelling of 12011220213121 in words is "twelve trillion, eleven billion, two hundred twenty million, two hundred thirteen thousand, one hundred twenty-one".