20412121529 has 2 divisors, whose sum is σ = 20412121530. Its totient is φ = 20412121528.

The previous prime is 20412121507. The next prime is 20412121601. The reversal of 20412121529 is 92512121402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18252010000 + 2160111529 = 135100^2 + 46477^2 .

It is a cyclic number.

It is not a de Polignac number, because 20412121529 - 2⁸ = 20412121273 is a prime.

It is not a weakly prime, because it can be changed into another prime (20412121229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206060764 + 10206060765.

It is an arithmetic number, because the mean of its divisors is an integer number (10206060765).

Almost surely, 2^20412121529 is an apocalyptic number.

It is an amenable number.

20412121529 is a deficient number, since it is larger than the sum of its proper divisors (1).

20412121529 is an equidigital number, since it uses as much as digits as its factorization.

20412121529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 20412121529 in words is "twenty billion, four hundred twelve million, one hundred twenty-one thousand, five hundred twenty-nine".