4291221331 has 2 divisors, whose sum is σ = 4291221332. Its totient is φ = 4291221330.

The previous prime is 4291221313. The next prime is 4291221359. The reversal of 4291221331 is 1331221924.

It is a happy number.

Together with previous prime (4291221313) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (4291221359) can be obtained adding 4291221331 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4291221331 - 2⁵ = 4291221299 is a prime.

It is a super-2 number, since 2×4291221331² = 36829161023258823122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4291221331.

It is not a weakly prime, because it can be changed into another prime (4291221391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2145610665 + 2145610666.

It is an arithmetic number, because the mean of its divisors is an integer number (2145610666).

Almost surely, 2^4291221331 is an apocalyptic number.

4291221331 is a deficient number, since it is larger than the sum of its proper divisors (1).

4291221331 is an equidigital number, since it uses as much as digits as its factorization.

4291221331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 4291221331 is about 65507.4143208233. The cubic root of 4291221331 is about 1625.0259664174.

The spelling of 4291221331 in words is "four billion, two hundred ninety-one million, two hundred twenty-one thousand, three hundred thirty-one".