3420421331 has 2 divisors, whose sum is σ = 3420421332. Its totient is φ = 3420421330.

The previous prime is 3420421313. The next prime is 3420421391. The reversal of 3420421331 is 1331240243.

Together with previous prime (3420421313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1331240243) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3420421331 is a prime.

It is a super-2 number, since 2×3420421331² = 23398564163119623122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3420421297 and 3420421306.

It is not a weakly prime, because it can be changed into another prime (3420421391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710210665 + 1710210666.

It is an arithmetic number, because the mean of its divisors is an integer number (1710210666).

Almost surely, 2^3420421331 is an apocalyptic number.

3420421331 is a deficient number, since it is larger than the sum of its proper divisors (1).

3420421331 is an equidigital number, since it uses as much as digits as its factorization.

3420421331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 3420421331 is about 58484.3682619553. The cubic root of 3420421331 is about 1506.6991227041.

Adding to 3420421331 its reverse (1331240243), we get a palindrome (4751661574).

The spelling of 3420421331 in words is "three billion, four hundred twenty million, four hundred twenty-one thousand, three hundred thirty-one".