1321322101109 has 4 divisors (see below), whose sum is σ = 1399046930604. Its totient is φ = 1243597271616.

The previous prime is 1321322101087. The next prime is 1321322101193. The reversal of 1321322101109 is 9011012231231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1016890728100 + 304431373009 = 1008410^2 + 551753^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321322101109 - 2⁸ = 1321322100853 is a prime.

It is a super-3 number, since 3×1321322101109³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321322103109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38862414722 + ... + 38862414755.

It is an arithmetic number, because the mean of its divisors is an integer number (349761732651).

Almost surely, 2^{1321322101109} is an apocalyptic number.

It is an amenable number.

1321322101109 is a deficient number, since it is larger than the sum of its proper divisors (77724829495).

1321322101109 is an equidigital number, since it uses as much as digits as its factorization.

1321322101109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77724829494.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 1321322101109 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-two million, one hundred one thousand, one hundred nine".