421331311 has 2 divisors, whose sum is σ = 421331312. Its totient is φ = 421331310.

The previous prime is 421331303. The next prime is 421331333. The reversal of 421331311 is 113133124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421331311 - 2³ = 421331303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421331611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210665655 + 210665656.

It is an arithmetic number, because the mean of its divisors is an integer number (210665656).

Almost surely, 2^421331311 is an apocalyptic number.

421331311 is a deficient number, since it is larger than the sum of its proper divisors (1).

421331311 is an equidigital number, since it uses as much as digits as its factorization.

421331311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 421331311 is about 20526.3564959785. The cubic root of 421331311 is about 749.6776754216.

Adding to 421331311 its reverse (113133124), we get a palindrome (534464435).

The spelling of 421331311 in words is "four hundred twenty-one million, three hundred thirty-one thousand, three hundred eleven".