2021110144657 has 2 divisors, whose sum is σ = 2021110144658. Its totient is φ = 2021110144656.

The previous prime is 2021110144649. The next prime is 2021110144687. The reversal of 2021110144657 is 7564410111202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1994263649856 + 26846494801 = 1412184^2 + 163849^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021110144657 - 2³ = 2021110144649 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021110144607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010555072328 + 1010555072329.

It is an arithmetic number, because the mean of its divisors is an integer number (1010555072329).

Almost surely, 2^{2021110144657} is an apocalyptic number.

It is an amenable number.

2021110144657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021110144657 is an equidigital number, since it uses as much as digits as its factorization.

2021110144657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 34.

Adding to 2021110144657 its reverse (7564410111202), we get a palindrome (9585520255859).

The spelling of 2021110144657 in words is "two trillion, twenty-one billion, one hundred ten million, one hundred forty-four thousand, six hundred fifty-seven".