420032023421 has 2 divisors, whose sum is σ = 420032023422. Its totient is φ = 420032023420.

The previous prime is 420032023417. The next prime is 420032023469. The reversal of 420032023421 is 124320230024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 404478192196 + 15553831225 = 635986^2 + 124715^2 .

It is a cyclic number.

It is not a de Polignac number, because 420032023421 - 2² = 420032023417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420032023721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210016011710 + 210016011711.

It is an arithmetic number, because the mean of its divisors is an integer number (210016011711).

Almost surely, 2^420032023421 is an apocalyptic number.

It is an amenable number.

420032023421 is a deficient number, since it is larger than the sum of its proper divisors (1).

420032023421 is an equidigital number, since it uses as much as digits as its factorization.

420032023421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 420032023421 its reverse (124320230024), we get a palindrome (544352253445).

The spelling of 420032023421 in words is "four hundred twenty billion, thirty-two million, twenty-three thousand, four hundred twenty-one".