31222021891141 has 2 divisors, whose sum is σ = 31222021891142. Its totient is φ = 31222021891140.

The previous prime is 31222021891133. The next prime is 31222021891169. The reversal of 31222021891141 is 14119812022213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21482566835041 + 9739455056100 = 4634929^2 + 3120810^2 .

It is a cyclic number.

It is not a de Polignac number, because 31222021891141 - 2³ = 31222021891133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31222021891141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31222021891741) 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, 15611010945570 + 15611010945571.

It is an arithmetic number, because the mean of its divisors is an integer number (15611010945571).

Almost surely, 2^{31222021891141} is an apocalyptic number.

It is an amenable number.

31222021891141 is a deficient number, since it is larger than the sum of its proper divisors (1).

31222021891141 is an equidigital number, since it uses as much as digits as its factorization.

31222021891141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 31222021891141 in words is "thirty-one trillion, two hundred twenty-two billion, twenty-one million, eight hundred ninety-one thousand, one hundred forty-one".