20124121201 has 2 divisors, whose sum is σ = 20124121202. Its totient is φ = 20124121200.

The previous prime is 20124121159. The next prime is 20124121219. The reversal of 20124121201 is 10212142102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15475608801 + 4648512400 = 124401^2 + 68180^2 .

It is a cyclic number.

It is not a de Polignac number, because 20124121201 - 2¹⁷ = 20123990129 is a prime.

It is a super-2 number, since 2×20124121201² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20124121261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062060600 + 10062060601.

It is an arithmetic number, because the mean of its divisors is an integer number (10062060601).

Almost surely, 2^20124121201 is an apocalyptic number.

It is an amenable number.

20124121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20124121201 is an equidigital number, since it uses as much as digits as its factorization.

20124121201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20124121201 its reverse (10212142102), we get a palindrome (30336263303).

The spelling of 20124121201 in words is "twenty billion, one hundred twenty-four million, one hundred twenty-one thousand, two hundred one".