212023021057 has 2 divisors, whose sum is σ = 212023021058. Its totient is φ = 212023021056.

The previous prime is 212023020997. The next prime is 212023021081. The reversal of 212023021057 is 750120320212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210446057536 + 1576963521 = 458744^2 + 39711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212023021057 is a prime.

It is a super-2 number, since 2×212023021057² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212023025057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106011510528 + 106011510529.

It is an arithmetic number, because the mean of its divisors is an integer number (106011510529).

Almost surely, 2^212023021057 is an apocalyptic number.

It is an amenable number.

212023021057 is a deficient number, since it is larger than the sum of its proper divisors (1).

212023021057 is an equidigital number, since it uses as much as digits as its factorization.

212023021057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

Adding to 212023021057 its reverse (750120320212), we get a palindrome (962143341269).

The spelling of 212023021057 in words is "two hundred twelve billion, twenty-three million, twenty-one thousand, fifty-seven".