20412121601 has 2 divisors, whose sum is σ = 20412121602. Its totient is φ = 20412121600.

The previous prime is 20412121529. The next prime is 20412121619. The reversal of 20412121601 is 10612121402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19993960000 + 418161601 = 141400^2 + 20449^2 .

It is a cyclic number.

It is not a de Polignac number, because 20412121601 - 2³⁰ = 19338379777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20412121661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206060800 + 10206060801.

It is an arithmetic number, because the mean of its divisors is an integer number (10206060801).

Almost surely, 2^20412121601 is an apocalyptic number.

It is an amenable number.

20412121601 is a deficient number, since it is larger than the sum of its proper divisors (1).

20412121601 is an equidigital number, since it uses as much as digits as its factorization.

20412121601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The spelling of 20412121601 in words is "twenty billion, four hundred twelve million, one hundred twenty-one thousand, six hundred one".