1321100241 has 16 divisors (see below), whose sum is σ = 1791992448. Its totient is φ = 865497600.

The previous prime is 1321100239. The next prime is 1321100251. The reversal of 1321100241 is 1420011231.

It is not a de Polignac number, because 1321100241 - 2¹ = 1321100239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321100241.

It is not an unprimeable number, because it can be changed into a prime (1321100201) 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, 247521 + ... + 252801.

It is an arithmetic number, because the mean of its divisors is an integer number (111999528).

Almost surely, 2^1321100241 is an apocalyptic number.

It is an amenable number.

1321100241 is a deficient number, since it is larger than the sum of its proper divisors (470892207).

1321100241 is a wasteful number, since it uses less digits than its factorization.

1321100241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6712.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1321100241 is about 36346.9426637235. The cubic root of 1321100241 is about 1097.2660040812.

Adding to 1321100241 its reverse (1420011231), we get a palindrome (2741111472).

The spelling of 1321100241 in words is "one billion, three hundred twenty-one million, one hundred thousand, two hundred forty-one".