421266036523 has 2 divisors, whose sum is σ = 421266036524. Its totient is φ = 421266036522.

The previous prime is 421266036497. The next prime is 421266036533. The reversal of 421266036523 is 325630662124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421266036523 - 2²⁹ = 420729165611 is a prime.

It is not a weakly prime, because it can be changed into another prime (421266036533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210633018261 + 210633018262.

It is an arithmetic number, because the mean of its divisors is an integer number (210633018262).

Almost surely, 2^421266036523 is an apocalyptic number.

421266036523 is a deficient number, since it is larger than the sum of its proper divisors (1).

421266036523 is an equidigital number, since it uses as much as digits as its factorization.

421266036523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 40.

Adding to 421266036523 its reverse (325630662124), we get a palindrome (746896698647).

The spelling of 421266036523 in words is "four hundred twenty-one billion, two hundred sixty-six million, thirty-six thousand, five hundred twenty-three".