1121431301 has 4 divisors (see below), whose sum is σ = 1122710892. Its totient is φ = 1120151712.

The previous prime is 1121431273. The next prime is 1121431313. The reversal of 1121431301 is 1031341211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1031341211 = 743 ⋅1388077.

It can be written as a sum of positive squares in 2 ways, for example, as 354418276 + 767013025 = 18826^2 + 27695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121431301 - 2⁶ = 1121431237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121431301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121431321) 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, 638480 + ... + 640233.

It is an arithmetic number, because the mean of its divisors is an integer number (280677723).

Almost surely, 2^1121431301 is an apocalyptic number.

It is an amenable number.

1121431301 is a deficient number, since it is larger than the sum of its proper divisors (1279591).

1121431301 is an equidigital number, since it uses as much as digits as its factorization.

1121431301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279590.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1121431301 is about 33487.7783825682. The cubic root of 1121431301 is about 1038.9410143188.

Adding to 1121431301 its reverse (1031341211), we get a palindrome (2152772512).

The spelling of 1121431301 in words is "one billion, one hundred twenty-one million, four hundred thirty-one thousand, three hundred one".