431101423421 has 2 divisors, whose sum is σ = 431101423422. Its totient is φ = 431101423420.

The previous prime is 431101423349. The next prime is 431101423453. The reversal of 431101423421 is 124324101134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428388576196 + 2712847225 = 654514^2 + 52085^2 .

It is a cyclic number.

It is not a de Polignac number, because 431101423421 - 2¹⁸ = 431101161277 is a prime.

It is a super-2 number, since 2×431101423421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431101423481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215550711710 + 215550711711.

It is an arithmetic number, because the mean of its divisors is an integer number (215550711711).

Almost surely, 2^431101423421 is an apocalyptic number.

It is an amenable number.

431101423421 is a deficient number, since it is larger than the sum of its proper divisors (1).

431101423421 is an equidigital number, since it uses as much as digits as its factorization.

431101423421 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 26.

Adding to 431101423421 its reverse (124324101134), we get a palindrome (555425524555).

The spelling of 431101423421 in words is "four hundred thirty-one billion, one hundred one million, four hundred twenty-three thousand, four hundred twenty-one".