213010021052557 has 2 divisors, whose sum is σ = 213010021052558. Its totient is φ = 213010021052556.

The previous prime is 213010021052537. The next prime is 213010021052599. The reversal of 213010021052557 is 755250120010312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182044479972996 + 30965541079561 = 13492386^2 + 5564669^2 .

It is a cyclic number.

It is not a de Polignac number, because 213010021052557 - 2³¹ = 213007873568909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213010021052527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106505010526278 + 106505010526279.

It is an arithmetic number, because the mean of its divisors is an integer number (106505010526279).

Almost surely, 2^{213010021052557} is an apocalyptic number.

It is an amenable number.

213010021052557 is a deficient number, since it is larger than the sum of its proper divisors (1).

213010021052557 is an equidigital number, since it uses as much as digits as its factorization.

213010021052557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 34.

Adding to 213010021052557 its reverse (755250120010312), we get a palindrome (968260141062869).

The spelling of 213010021052557 in words is "two hundred thirteen trillion, ten billion, twenty-one million, fifty-two thousand, five hundred fifty-seven".