423351130211221 has 2 divisors, whose sum is σ = 423351130211222. Its totient is φ = 423351130211220.

The previous prime is 423351130211183. The next prime is 423351130211239. The reversal of 423351130211221 is 122112031153324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 322471303440196 + 100879826771025 = 17957486^2 + 10043895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423351130211221 is a prime.

It is a super-2 number, since 2×423351130211221² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423351133211221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211675565105610 + 211675565105611.

It is an arithmetic number, because the mean of its divisors is an integer number (211675565105611).

Almost surely, 2^{423351130211221} is an apocalyptic number.

It is an amenable number.

423351130211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

423351130211221 is an equidigital number, since it uses as much as digits as its factorization.

423351130211221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 423351130211221 its reverse (122112031153324), we get a palindrome (545463161364545).

The spelling of 423351130211221 in words is "four hundred twenty-three trillion, three hundred fifty-one billion, one hundred thirty million, two hundred eleven thousand, two hundred twenty-one".