1011121321 has 24 divisors (see below), whose sum is σ = 1210397280. Its totient is φ = 841845312.

The previous prime is 1011121297. The next prime is 1011121343. The reversal of 1011121321 is 1231211101.

It is a happy number.

1011121321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1011121321 - 2¹¹ = 1011119273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011121351) 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, 237550 + ... + 241768.

It is an arithmetic number, because the mean of its divisors is an integer number (50433220).

Almost surely, 2^1011121321 is an apocalyptic number.

It is an amenable number.

1011121321 is a deficient number, since it is larger than the sum of its proper divisors (199275959).

1011121321 is an equidigital number, since it uses as much as digits as its factorization.

1011121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373 (or 4366 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1011121321 is about 31798.1339232352. The cubic root of 1011121321 is about 1003.6934486423.

Adding to 1011121321 its reverse (1231211101), we get a palindrome (2242332422).

The spelling of 1011121321 in words is "one billion, eleven million, one hundred twenty-one thousand, three hundred twenty-one".