2112021121291 has 2 divisors, whose sum is σ = 2112021121292. Its totient is φ = 2112021121290.

The previous prime is 2112021121169. The next prime is 2112021121297. The reversal of 2112021121291 is 1921211202112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2112021121291 - 2¹³ = 2112021113099 is a prime.

It is not a weakly prime, because it can be changed into another prime (2112021121297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056010560645 + 1056010560646.

It is an arithmetic number, because the mean of its divisors is an integer number (1056010560646).

Almost surely, 2^{2112021121291} is an apocalyptic number.

2112021121291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112021121291 is an equidigital number, since it uses as much as digits as its factorization.

2112021121291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 2112021121291 in words is "two trillion, one hundred twelve billion, twenty-one million, one hundred twenty-one thousand, two hundred ninety-one".