1221585131303 has 2 divisors, whose sum is σ = 1221585131304. Its totient is φ = 1221585131302.

The previous prime is 1221585131281. The next prime is 1221585131309. The reversal of 1221585131303 is 3031315851221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221585131303 - 2¹⁸ = 1221584869159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221585131309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610792565651 + 610792565652.

It is an arithmetic number, because the mean of its divisors is an integer number (610792565652).

Almost surely, 2^{1221585131303} is an apocalyptic number.

1221585131303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221585131303 is an equidigital number, since it uses as much as digits as its factorization.

1221585131303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 1221585131303 in words is "one trillion, two hundred twenty-one billion, five hundred eighty-five million, one hundred thirty-one thousand, three hundred three".