1321441121 has 24 divisors (see below), whose sum is σ = 1787698752. Its totient is φ = 950479200.

The previous prime is 1321441081. The next prime is 1321441171. The reversal of 1321441121 is 1211441231.

It is not a de Polignac number, because 1321441121 - 2¹⁰ = 1321440097 is a prime.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1321441093 and 1321441102.

It is not an unprimeable number, because it can be changed into a prime (1321441171) 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, 48995 + ... + 71016.

It is an arithmetic number, because the mean of its divisors is an integer number (74487448).

Almost surely, 2^1321441121 is an apocalyptic number.

1321441121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1321441121 is a deficient number, since it is larger than the sum of its proper divisors (466257631).

1321441121 is a wasteful number, since it uses less digits than its factorization.

1321441121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120053 (or 120042 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 1321441121 is about 36351.6316140005. The cubic root of 1321441121 is about 1097.3603708466.

Adding to 1321441121 its reverse (1211441231), we get a palindrome (2532882352).

The spelling of 1321441121 in words is "one billion, three hundred twenty-one million, four hundred forty-one thousand, one hundred twenty-one".