20122000421 has 2 divisors, whose sum is σ = 20122000422. Its totient is φ = 20122000420.

The previous prime is 20122000387. The next prime is 20122000439. The reversal of 20122000421 is 12400022102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14650439521 + 5471560900 = 121039^2 + 73970^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122000421 - 2³⁴ = 2942131237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20122000396 and 20122000405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122000621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061000210 + 10061000211.

It is an arithmetic number, because the mean of its divisors is an integer number (10061000211).

Almost surely, 2^20122000421 is an apocalyptic number.

It is an amenable number.

20122000421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122000421 is an equidigital number, since it uses as much as digits as its factorization.

20122000421 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 14.

Adding to 20122000421 its reverse (12400022102), we get a palindrome (32522022523).

The spelling of 20122000421 in words is "twenty billion, one hundred twenty-two million, four hundred twenty-one", and thus it is an aban number.