12010121111221 has 2 divisors, whose sum is σ = 12010121111222. Its totient is φ = 12010121111220.

The previous prime is 12010121111201. The next prime is 12010121111231. The reversal of 12010121111221 is 12211112101021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11717688918321 + 292432192900 = 3423111^2 + 540770^2 .

It is a cyclic number.

It is not a de Polignac number, because 12010121111221 - 2¹⁵ = 12010121078453 is a prime.

It is a super-2 number, since 2×12010121111221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12010121111195 and 12010121111204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12010121111201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005060555610 + 6005060555611.

It is an arithmetic number, because the mean of its divisors is an integer number (6005060555611).

Almost surely, 2^{12010121111221} is an apocalyptic number.

It is an amenable number.

12010121111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12010121111221 is an equidigital number, since it uses as much as digits as its factorization.

12010121111221 is an evil number, because the sum of its binary digits is even.

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

Adding to 12010121111221 its reverse (12211112101021), we get a palindrome (24221233212242).

The spelling of 12010121111221 in words is "twelve trillion, ten billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".