423100200421 has 2 divisors, whose sum is σ = 423100200422. Its totient is φ = 423100200420.

The previous prime is 423100200371. The next prime is 423100200427. The reversal of 423100200421 is 124002001324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392014984321 + 31085216100 = 626111^2 + 176310^2 .

It is a cyclic number.

It is not a de Polignac number, because 423100200421 - 2⁷ = 423100200293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423100200427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211550100210 + 211550100211.

It is an arithmetic number, because the mean of its divisors is an integer number (211550100211).

Almost surely, 2^423100200421 is an apocalyptic number.

It is an amenable number.

423100200421 is a deficient number, since it is larger than the sum of its proper divisors (1).

423100200421 is an equidigital number, since it uses as much as digits as its factorization.

423100200421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 423100200421 its reverse (124002001324), we get a palindrome (547102201745).

The spelling of 423100200421 in words is "four hundred twenty-three billion, one hundred million, two hundred thousand, four hundred twenty-one".