421332311 has 2 divisors, whose sum is σ = 421332312. Its totient is φ = 421332310.

The previous prime is 421332293. The next prime is 421332313. The reversal of 421332311 is 113233124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421332311 is a prime.

Together with 421332313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421332313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210666155 + 210666156.

It is an arithmetic number, because the mean of its divisors is an integer number (210666156).

Almost surely, 2^421332311 is an apocalyptic number.

421332311 is a deficient number, since it is larger than the sum of its proper divisors (1).

421332311 is an equidigital number, since it uses as much as digits as its factorization.

421332311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 20.

The square root of 421332311 is about 20526.3808548901. The cubic root of 421332311 is about 749.6782685234.

Adding to 421332311 its reverse (113233124), we get a palindrome (534565435).

It can be divided in two parts, 42133 and 2311, that added together give a palindrome (44444).

The spelling of 421332311 in words is "four hundred twenty-one million, three hundred thirty-two thousand, three hundred eleven".