4063131221 has 2 divisors, whose sum is σ = 4063131222. Its totient is φ = 4063131220.

The previous prime is 4063131187. The next prime is 4063131227. The reversal of 4063131221 is 1221313604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3250596196 + 812535025 = 57014^2 + 28505^2 .

It is a cyclic number.

It is not a de Polignac number, because 4063131221 - 2¹⁴ = 4063114837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4063131227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2031565610 + 2031565611.

It is an arithmetic number, because the mean of its divisors is an integer number (2031565611).

Almost surely, 2^4063131221 is an apocalyptic number.

It is an amenable number.

4063131221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4063131221 is an equidigital number, since it uses as much as digits as its factorization.

4063131221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 4063131221 is about 63742.6954324964. The cubic root of 4063131221 is about 1595.7087118863.

Adding to 4063131221 its reverse (1221313604), we get a palindrome (5284444825).

The spelling of 4063131221 in words is "four billion, sixty-three million, one hundred thirty-one thousand, two hundred twenty-one".