1221442440319 has 2 divisors, whose sum is σ = 1221442440320. Its totient is φ = 1221442440318.

The previous prime is 1221442440203. The next prime is 1221442440359. The reversal of 1221442440319 is 9130442441221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221442440319 - 2⁹ = 1221442439807 is a prime.

It is a super-2 number, since 2×1221442440319² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221442440359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610721220159 + 610721220160.

It is an arithmetic number, because the mean of its divisors is an integer number (610721220160).

Almost surely, 2^{1221442440319} is an apocalyptic number.

1221442440319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221442440319 is an equidigital number, since it uses as much as digits as its factorization.

1221442440319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 1221442440319 in words is "one trillion, two hundred twenty-one billion, four hundred forty-two million, four hundred forty thousand, three hundred nineteen".