266010020252021 has 2 divisors, whose sum is σ = 266010020252022. Its totient is φ = 266010020252020.

The previous prime is 266010020251973. The next prime is 266010020252027. The reversal of 266010020252021 is 120252020010662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265667343483025 + 342676768996 = 16299305^2 + 585386^2 .

It is a cyclic number.

It is not a de Polignac number, because 266010020252021 - 2¹⁸ = 266010019989877 is a prime.

It is a super-2 number, since 2×266010020252021² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266010020252027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133005010126010 + 133005010126011.

It is an arithmetic number, because the mean of its divisors is an integer number (133005010126011).

Almost surely, 2^{266010020252021} is an apocalyptic number.

It is an amenable number.

266010020252021 is a deficient number, since it is larger than the sum of its proper divisors (1).

266010020252021 is an equidigital number, since it uses as much as digits as its factorization.

266010020252021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 266010020252021 its reverse (120252020010662), we get a palindrome (386262040262683).

The spelling of 266010020252021 in words is "two hundred sixty-six trillion, ten billion, twenty million, two hundred fifty-two thousand, twenty-one".