2021110144649 has 2 divisors, whose sum is σ = 2021110144650. Its totient is φ = 2021110144648.

The previous prime is 2021110144639. The next prime is 2021110144657. The reversal of 2021110144649 is 9464410111202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2003456239225 + 17653905424 = 1415435^2 + 132868^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021110144649 - 2⁴ = 2021110144633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2021110144639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010555072324 + 1010555072325.

It is an arithmetic number, because the mean of its divisors is an integer number (1010555072325).

Almost surely, 2^{2021110144649} is an apocalyptic number.

It is an amenable number.

2021110144649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021110144649 is an equidigital number, since it uses as much as digits as its factorization.

2021110144649 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 35.

The spelling of 2021110144649 in words is "two trillion, twenty-one billion, one hundred ten million, one hundred forty-four thousand, six hundred forty-nine".