1321121141 has 4 divisors (see below), whose sum is σ = 1363737984. Its totient is φ = 1278504300.

The previous prime is 1321121111. The next prime is 1321121161. The reversal of 1321121141 is 1411211231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1411211231 = 53 ⋅26626627.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321121141 is a prime.

It is a super-2 number, since 2×1321121141² = 3490722138394283762, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321121101) 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, 21308375 + ... + 21308436.

It is an arithmetic number, because the mean of its divisors is an integer number (340934496).

Almost surely, 2^1321121141 is an apocalyptic number.

It is an amenable number.

1321121141 is a deficient number, since it is larger than the sum of its proper divisors (42616843).

1321121141 is an equidigital number, since it uses as much as digits as its factorization.

1321121141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42616842.

The product of its digits is 48, while the sum is 17.

The square root of 1321121141 is about 36347.2301695741. The cubic root of 1321121141 is about 1097.2717903538.

Adding to 1321121141 its reverse (1411211231), we get a palindrome (2732332372).

The spelling of 1321121141 in words is "one billion, three hundred twenty-one million, one hundred twenty-one thousand, one hundred forty-one".