421121301529 has 2 divisors, whose sum is σ = 421121301530. Its totient is φ = 421121301528.

The previous prime is 421121301427. The next prime is 421121301533. The reversal of 421121301529 is 925103121124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251249557504 + 169871744025 = 501248^2 + 412155^2 .

It is a cyclic number.

It is not a de Polignac number, because 421121301529 - 2⁷ = 421121301401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421121301529.

It is not a weakly prime, because it can be changed into another prime (421121304529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210560650764 + 210560650765.

It is an arithmetic number, because the mean of its divisors is an integer number (210560650765).

Almost surely, 2^421121301529 is an apocalyptic number.

It is an amenable number.

421121301529 is a deficient number, since it is larger than the sum of its proper divisors (1).

421121301529 is an equidigital number, since it uses as much as digits as its factorization.

421121301529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 421121301529 in words is "four hundred twenty-one billion, one hundred twenty-one million, three hundred one thousand, five hundred twenty-nine".