2021121112291 has 2 divisors, whose sum is σ = 2021121112292. Its totient is φ = 2021121112290.

The previous prime is 2021121112217. The next prime is 2021121112357. The reversal of 2021121112291 is 1922111211202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021121112291 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021121112211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010560556145 + 1010560556146.

It is an arithmetic number, because the mean of its divisors is an integer number (1010560556146).

Almost surely, 2^{2021121112291} is an apocalyptic number.

2021121112291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021121112291 is an equidigital number, since it uses as much as digits as its factorization.

2021121112291 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2021121112291 its reverse (1922111211202), we get a palindrome (3943232323493).

The spelling of 2021121112291 in words is "two trillion, twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, two hundred ninety-one".