4001223668731 has 2 divisors, whose sum is σ = 4001223668732. Its totient is φ = 4001223668730.

The previous prime is 4001223668693. The next prime is 4001223668747. The reversal of 4001223668731 is 1378663221004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4001223668731 - 2²⁷ = 4001089451003 is a prime.

It is a super-2 number, since 2×4001223668731² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4001223618731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000611834365 + 2000611834366.

It is an arithmetic number, because the mean of its divisors is an integer number (2000611834366).

Almost surely, 2^{4001223668731} is an apocalyptic number.

4001223668731 is a deficient number, since it is larger than the sum of its proper divisors (1).

4001223668731 is an equidigital number, since it uses as much as digits as its factorization.

4001223668731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 43.

Adding to 4001223668731 its reverse (1378663221004), we get a palindrome (5379886889735).

The spelling of 4001223668731 in words is "four trillion, one billion, two hundred twenty-three million, six hundred sixty-eight thousand, seven hundred thirty-one".