122000020421 has 2 divisors, whose sum is σ = 122000020422. Its totient is φ = 122000020420.

The previous prime is 122000020403. The next prime is 122000020459. The reversal of 122000020421 is 124020000221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107669296900 + 14330723521 = 328130^2 + 119711^2 .

It is a cyclic number.

It is not a de Polignac number, because 122000020421 - 2¹⁴ = 122000004037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122000020396 and 122000020405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122000020921) 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, 61000010210 + 61000010211.

It is an arithmetic number, because the mean of its divisors is an integer number (61000010211).

Almost surely, 2^122000020421 is an apocalyptic number.

It is an amenable number.

122000020421 is a deficient number, since it is larger than the sum of its proper divisors (1).

122000020421 is an equidigital number, since it uses as much as digits as its factorization.

122000020421 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 122000020421 its reverse (124020000221), we get a palindrome (246020020642).

It can be divided in two parts, 1220000 and 20421, that added together give a palindrome (1240421).

The spelling of 122000020421 in words is "one hundred twenty-two billion, twenty thousand, four hundred twenty-one".