210011210021057 has 2 divisors, whose sum is σ = 210011210021058. Its totient is φ = 210011210021056.

The previous prime is 210011210020907. The next prime is 210011210021131. The reversal of 210011210021057 is 750120012110012.

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., 208280430341776 + 1730779679281 = 14431924^2 + 1315591^2 .

It is a cyclic number.

It is not a de Polignac number, because 210011210021057 - 2¹⁰ = 210011210020033 is a prime.

It is a super-4 number, since 4×210011210021057⁴ (a number of 58 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (210011210021357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105005605010528 + 105005605010529.

It is an arithmetic number, because the mean of its divisors is an integer number (105005605010529).

Almost surely, 2^{210011210021057} is an apocalyptic number.

It is an amenable number.

210011210021057 is a deficient number, since it is larger than the sum of its proper divisors (1).

210011210021057 is an equidigital number, since it uses as much as digits as its factorization.

210011210021057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 23.

Adding to 210011210021057 its reverse (750120012110012), we get a palindrome (960131222131069).

The spelling of 210011210021057 in words is "two hundred ten trillion, eleven billion, two hundred ten million, twenty-one thousand, fifty-seven".