403421022421 has 2 divisors, whose sum is σ = 403421022422. Its totient is φ = 403421022420.

The previous prime is 403421022343. The next prime is 403421022451. The reversal of 403421022421 is 124220124304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397467202500 + 5953819921 = 630450^2 + 77161^2 .

It is a cyclic number.

It is not a de Polignac number, because 403421022421 - 2⁷ = 403421022293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403421022451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201710511210 + 201710511211.

It is an arithmetic number, because the mean of its divisors is an integer number (201710511211).

Almost surely, 2^403421022421 is an apocalyptic number.

It is an amenable number.

403421022421 is a deficient number, since it is larger than the sum of its proper divisors (1).

403421022421 is an equidigital number, since it uses as much as digits as its factorization.

403421022421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 403421022421 its reverse (124220124304), we get a palindrome (527641146725).

The spelling of 403421022421 in words is "four hundred three billion, four hundred twenty-one million, twenty-two thousand, four hundred twenty-one".