2921939397841 has 2 divisors, whose sum is σ = 2921939397842. Its totient is φ = 2921939397840.

The previous prime is 2921939397761. The next prime is 2921939397851. The reversal of 2921939397841 is 1487939391292.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2269228908816 + 652710489025 = 1506396^2 + 807905^2 .

It is a cyclic number.

It is not a de Polignac number, because 2921939397841 - 2¹⁵ = 2921939365073 is a prime.

It is a super-2 number, since 2×2921939397841² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2921939397851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460969698920 + 1460969698921.

It is an arithmetic number, because the mean of its divisors is an integer number (1460969698921).

Almost surely, 2^{2921939397841} is an apocalyptic number.

It is an amenable number.

2921939397841 is a deficient number, since it is larger than the sum of its proper divisors (1).

2921939397841 is an equidigital number, since it uses as much as digits as its factorization.

2921939397841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52907904, while the sum is 67.

The spelling of 2921939397841 in words is "two trillion, nine hundred twenty-one billion, nine hundred thirty-nine million, three hundred ninety-seven thousand, eight hundred forty-one".