421253124431 has 2 divisors, whose sum is σ = 421253124432. Its totient is φ = 421253124430.

The previous prime is 421253124419. The next prime is 421253124437. The reversal of 421253124431 is 134421352124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421253124431 - 2¹⁸ = 421252862287 is a prime.

It is a super-2 number, since 2×421253124431² (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 (421253124437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210626562215 + 210626562216.

It is an arithmetic number, because the mean of its divisors is an integer number (210626562216).

Almost surely, 2^421253124431 is an apocalyptic number.

421253124431 is a deficient number, since it is larger than the sum of its proper divisors (1).

421253124431 is an equidigital number, since it uses as much as digits as its factorization.

421253124431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 32.

Adding to 421253124431 its reverse (134421352124), we get a palindrome (555674476555).

The spelling of 421253124431 in words is "four hundred twenty-one billion, two hundred fifty-three million, one hundred twenty-four thousand, four hundred thirty-one".