1321257401183 has 4 divisors (see below), whose sum is σ = 1398978424800. Its totient is φ = 1243536377568.

The previous prime is 1321257401083. The next prime is 1321257401207. The reversal of 1321257401183 is 3811047521231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321257401183 - 2¹⁰ = 1321257400159 is a prime.

It is a super-2 number, since 2×1321257401183² (a number of 25 digits) contains 22 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 (1321257401083) 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, 38860511783 + ... + 38860511816.

It is an arithmetic number, because the mean of its divisors is an integer number (349744606200).

Almost surely, 2^{1321257401183} is an apocalyptic number.

1321257401183 is a deficient number, since it is larger than the sum of its proper divisors (77721023617).

1321257401183 is an equidigital number, since it uses as much as digits as its factorization.

1321257401183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77721023616.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 1321257401183 in words is "one trillion, three hundred twenty-one billion, two hundred fifty-seven million, four hundred one thousand, one hundred eighty-three".