2112877542221 has 2 divisors, whose sum is σ = 2112877542222. Its totient is φ = 2112877542220.

The previous prime is 2112877542203. The next prime is 2112877542289. The reversal of 2112877542221 is 1222457782112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1496242704100 + 616634838121 = 1223210^2 + 785261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112877542221 is a prime.

It is a super-2 number, since 2×2112877542221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112877542121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056438771110 + 1056438771111.

It is an arithmetic number, because the mean of its divisors is an integer number (1056438771111).

Almost surely, 2^{2112877542221} is an apocalyptic number.

It is an amenable number.

2112877542221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112877542221 is an equidigital number, since it uses as much as digits as its factorization.

2112877542221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 250880, while the sum is 44.

The spelling of 2112877542221 in words is "two trillion, one hundred twelve billion, eight hundred seventy-seven million, five hundred forty-two thousand, two hundred twenty-one".