2021456440049 has 2 divisors, whose sum is σ = 2021456440050. Its totient is φ = 2021456440048.

The previous prime is 2021456440019. The next prime is 2021456440151. The reversal of 2021456440049 is 9400446541202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1440192006400 + 581264433649 = 1200080^2 + 762407^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021456440049 - 2²⁴ = 2021439662833 is a prime.

It is a super-2 number, since 2×2021456440049² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021456439988 and 2021456440015.

It is not a weakly prime, because it can be changed into another prime (2021456440019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010728220024 + 1010728220025.

It is an arithmetic number, because the mean of its divisors is an integer number (1010728220025).

Almost surely, 2^{2021456440049} is an apocalyptic number.

It is an amenable number.

2021456440049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021456440049 is an equidigital number, since it uses as much as digits as its factorization.

2021456440049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 2021456440049 in words is "two trillion, twenty-one billion, four hundred fifty-six million, four hundred forty thousand, forty-nine".