2031144221 has 2 divisors, whose sum is σ = 2031144222. Its totient is φ = 2031144220.

The previous prime is 2031144197. The next prime is 2031144229. The reversal of 2031144221 is 1224411302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1833038596 + 198105625 = 42814^2 + 14075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2031144221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2031144193 and 2031144202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2031144229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015572110 + 1015572111.

It is an arithmetic number, because the mean of its divisors is an integer number (1015572111).

Almost surely, 2^2031144221 is an apocalyptic number.

It is an amenable number.

2031144221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031144221 is an equidigital number, since it uses as much as digits as its factorization.

2031144221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2031144221 is about 45068.2174153804. The cubic root of 2031144221 is about 1266.4272706011.

Adding to 2031144221 its reverse (1224411302), we get a palindrome (3255555523).

The spelling of 2031144221 in words is "two billion, thirty-one million, one hundred forty-four thousand, two hundred twenty-one".