2021104410649 has 2 divisors, whose sum is σ = 2021104410650. Its totient is φ = 2021104410648.

The previous prime is 2021104410613. The next prime is 2021104410667. The reversal of 2021104410649 is 9460144011202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1972100619225 + 49003791424 = 1404315^2 + 221368^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021104410649 - 2¹⁷ = 2021104279577 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021104410049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010552205324 + 1010552205325.

It is an arithmetic number, because the mean of its divisors is an integer number (1010552205325).

Almost surely, 2^{2021104410649} is an apocalyptic number.

It is an amenable number.

2021104410649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021104410649 is an equidigital number, since it uses as much as digits as its factorization.

2021104410649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 2021104410649 in words is "two trillion, twenty-one billion, one hundred four million, four hundred ten thousand, six hundred forty-nine".