12011121010121 has 2 divisors, whose sum is σ = 12011121010122. Its totient is φ = 12011121010120.

The previous prime is 12011121010117. The next prime is 12011121010171. The reversal of 12011121010121 is 12101012111021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9479009440000 + 2532111570121 = 3078800^2 + 1591261^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011121010121 - 2² = 12011121010117 is a prime.

It is a super-2 number, since 2×12011121010121² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12011121010096 and 12011121010105.

It is not a weakly prime, because it can be changed into another prime (12011121010171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005560505060 + 6005560505061.

It is an arithmetic number, because the mean of its divisors is an integer number (6005560505061).

Almost surely, 2^{12011121010121} is an apocalyptic number.

It is an amenable number.

12011121010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011121010121 is an equidigital number, since it uses as much as digits as its factorization.

12011121010121 is an evil number, because the sum of its binary digits is even.

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

Adding to 12011121010121 its reverse (12101012111021), we get a palindrome (24112133121142).

The spelling of 12011121010121 in words is "twelve trillion, eleven billion, one hundred twenty-one million, ten thousand, one hundred twenty-one".