423112001221 has 48 divisors (see below), whose sum is σ = 530274760704. Its totient is φ = 330531319872.

The previous prime is 423112001189. The next prime is 423112001237. The reversal of 423112001221 is 122100211324.

It is not a de Polignac number, because 423112001221 - 2⁵ = 423112001189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423112001321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42276600 + ... + 42286606.

It is an arithmetic number, because the mean of its divisors is an integer number (11047390848).

Almost surely, 2^423112001221 is an apocalyptic number.

It is an amenable number.

423112001221 is a deficient number, since it is larger than the sum of its proper divisors (107162759483).

423112001221 is a wasteful number, since it uses less digits than its factorization.

423112001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10490 (or 10477 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 423112001221 its reverse (122100211324), we get a palindrome (545212212545).

The spelling of 423112001221 in words is "four hundred twenty-three billion, one hundred twelve million, one thousand, two hundred twenty-one".