12001121012291 has 2 divisors, whose sum is σ = 12001121012292. Its totient is φ = 12001121012290.

The previous prime is 12001121012273. The next prime is 12001121012329. The reversal of 12001121012291 is 19221012110021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12001121012291 - 2⁶ = 12001121012227 is a prime.

It is not a weakly prime, because it can be changed into another prime (12001121212291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000560506145 + 6000560506146.

It is an arithmetic number, because the mean of its divisors is an integer number (6000560506146).

Almost surely, 2^{12001121012291} is an apocalyptic number.

12001121012291 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001121012291 is an equidigital number, since it uses as much as digits as its factorization.

12001121012291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 12001121012291 in words is "twelve trillion, one billion, one hundred twenty-one million, twelve thousand, two hundred ninety-one".