212201021057 has 2 divisors, whose sum is σ = 212201021058. Its totient is φ = 212201021056.

The previous prime is 212201021033. The next prime is 212201021129. The reversal of 212201021057 is 750120102212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149458786801 + 62742234256 = 386599^2 + 250484^2 .

It is a cyclic number.

It is not a de Polignac number, because 212201021057 - 2¹⁰ = 212201020033 is a prime.

It is a super-3 number, since 3×212201021057³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (212201621057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106100510528 + 106100510529.

It is an arithmetic number, because the mean of its divisors is an integer number (106100510529).

Almost surely, 2^212201021057 is an apocalyptic number.

It is an amenable number.

212201021057 is a deficient number, since it is larger than the sum of its proper divisors (1).

212201021057 is an equidigital number, since it uses as much as digits as its factorization.

212201021057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 212201021057 its reverse (750120102212), we get a palindrome (962321123269).

The spelling of 212201021057 in words is "two hundred twelve billion, two hundred one million, twenty-one thousand, fifty-seven".