2031132123221 has 2 divisors, whose sum is σ = 2031132123222. Its totient is φ = 2031132123220.

The previous prime is 2031132123197. The next prime is 2031132123233. The reversal of 2031132123221 is 1223212311302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1900730968900 + 130401154321 = 1378670^2 + 361111^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031132123221 - 2⁶ = 2031132123157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2031132122221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015566061610 + 1015566061611.

It is an arithmetic number, because the mean of its divisors is an integer number (1015566061611).

Almost surely, 2^{2031132123221} is an apocalyptic number.

It is an amenable number.

2031132123221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031132123221 is an equidigital number, since it uses as much as digits as its factorization.

2031132123221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2031132123221 its reverse (1223212311302), we get a palindrome (3254344434523).

The spelling of 2031132123221 in words is "two trillion, thirty-one billion, one hundred thirty-two million, one hundred twenty-three thousand, two hundred twenty-one".