1321222452281 has 24 divisors (see below), whose sum is σ = 1397523947904. Its totient is φ = 1246722459840.

The previous prime is 1321222452271. The next prime is 1321222452287. The reversal of 1321222452281 is 1822542221231.

It is not a de Polignac number, because 1321222452281 - 2³⁰ = 1320148710457 is a prime.

It is a super-2 number, since 2×1321222452281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1321222452287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207703541 + ... + 207709901.

It is an arithmetic number, because the mean of its divisors is an integer number (58230164496).

Almost surely, 2^{1321222452281} is an apocalyptic number.

It is an amenable number.

1321222452281 is a deficient number, since it is larger than the sum of its proper divisors (76301495623).

1321222452281 is an equidigital number, since it uses as much as digits as its factorization.

1321222452281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7989 (or 7910 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

The spelling of 1321222452281 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-two million, four hundred fifty-two thousand, two hundred eighty-one".