431401120621 has 2 divisors, whose sum is σ = 431401120622. Its totient is φ = 431401120620.

The previous prime is 431401120597. The next prime is 431401120627. The reversal of 431401120621 is 126021104134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 429352562500 + 2048558121 = 655250^2 + 45261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431401120621 is a prime.

It is a super-2 number, since 2×431401120621² (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 (431401120627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215700560310 + 215700560311.

It is an arithmetic number, because the mean of its divisors is an integer number (215700560311).

Almost surely, 2^431401120621 is an apocalyptic number.

It is an amenable number.

431401120621 is a deficient number, since it is larger than the sum of its proper divisors (1).

431401120621 is an equidigital number, since it uses as much as digits as its factorization.

431401120621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 431401120621 its reverse (126021104134), we get a palindrome (557422224755).

The spelling of 431401120621 in words is "four hundred thirty-one billion, four hundred one million, one hundred twenty thousand, six hundred twenty-one".