1321100253321 has 16 divisors (see below), whose sum is σ = 1826662569600. Its totient is φ = 848284230528.

The previous prime is 1321100253313. The next prime is 1321100253329. The reversal of 1321100253321 is 1233520011231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1321100253313) and next prime (1321100253329).

It is not a de Polignac number, because 1321100253321 - 2³ = 1321100253313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321100253291 and 1321100253300.

It is not an unprimeable number, because it can be changed into a prime (1321100253329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18528061 + ... + 18599226.

It is an arithmetic number, because the mean of its divisors is an integer number (114166410600).

Almost surely, 2^{1321100253321} is an apocalyptic number.

It is an amenable number.

1321100253321 is a deficient number, since it is larger than the sum of its proper divisors (505562316279).

1321100253321 is a wasteful number, since it uses less digits than its factorization.

1321100253321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37127728.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 1321100253321 its reverse (1233520011231), we get a palindrome (2554620264552).

The spelling of 1321100253321 in words is "one trillion, three hundred twenty-one billion, one hundred million, two hundred fifty-three thousand, three hundred twenty-one".