1221031332319 has 2 divisors, whose sum is σ = 1221031332320. Its totient is φ = 1221031332318.

The previous prime is 1221031332233. The next prime is 1221031332337. The reversal of 1221031332319 is 9132331301221.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9132331301221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221031332319 - 2³⁵ = 1186671593951 is a prime.

It is a super-2 number, since 2×1221031332319² (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 (1221031332119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610515666159 + 610515666160.

It is an arithmetic number, because the mean of its divisors is an integer number (610515666160).

Almost surely, 2^{1221031332319} is an apocalyptic number.

1221031332319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221031332319 is an equidigital number, since it uses as much as digits as its factorization.

1221031332319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The spelling of 1221031332319 in words is "one trillion, two hundred twenty-one billion, thirty-one million, three hundred thirty-two thousand, three hundred nineteen".