1011261323 has 4 divisors (see below), whose sum is σ = 1043882688. Its totient is φ = 978639960.

The previous prime is 1011261289. The next prime is 1011261331. The reversal of 1011261323 is 3231621101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3231621101 = 59 ⋅54773239.

It is a cyclic number.

It is not a de Polignac number, because 1011261323 - 2¹⁴ = 1011244939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011261295 and 1011261304.

It is not an unprimeable number, because it can be changed into a prime (1011261623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16310636 + ... + 16310697.

It is an arithmetic number, because the mean of its divisors is an integer number (260970672).

Almost surely, 2^1011261323 is an apocalyptic number.

1011261323 is a deficient number, since it is larger than the sum of its proper divisors (32621365).

1011261323 is an equidigital number, since it uses as much as digits as its factorization.

1011261323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32621364.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1011261323 is about 31800.3352655283. The cubic root of 1011261323 is about 1003.7397710114.

Adding to 1011261323 its reverse (3231621101), we get a palindrome (4242882424).

The spelling of 1011261323 in words is "one billion, eleven million, two hundred sixty-one thousand, three hundred twenty-three".