200420103012121 has 2 divisors, whose sum is σ = 200420103012122. Its totient is φ = 200420103012120.

The previous prime is 200420103012119. The next prime is 200420103012139. The reversal of 200420103012121 is 121210301024002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149046129318025 + 51373973694096 = 12208445^2 + 7167564^2 .

It is a cyclic number.

It is not a de Polignac number, because 200420103012121 - 2¹ = 200420103012119 is a prime.

Together with 200420103012119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (200420103012161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100210051506060 + 100210051506061.

It is an arithmetic number, because the mean of its divisors is an integer number (100210051506061).

Almost surely, 2^{200420103012121} is an apocalyptic number.

It is an amenable number.

200420103012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

200420103012121 is an equidigital number, since it uses as much as digits as its factorization.

200420103012121 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 19.

Adding to 200420103012121 its reverse (121210301024002), we get a palindrome (321630404036123).

The spelling of 200420103012121 in words is "two hundred trillion, four hundred twenty billion, one hundred three million, twelve thousand, one hundred twenty-one".