1121323021 has 16 divisors (see below), whose sum is σ = 1380905344. Its totient is φ = 886676544.

The previous prime is 1121323001. The next prime is 1121323037. The reversal of 1121323021 is 1203231211.

It is not a de Polignac number, because 1121323021 - 2¹³ = 1121314829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121322986 and 1121323004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121323001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241306 + ... + 245908.

It is an arithmetic number, because the mean of its divisors is an integer number (86306584).

Almost surely, 2^1121323021 is an apocalyptic number.

It is an amenable number.

1121323021 is a deficient number, since it is larger than the sum of its proper divisors (259582323).

1121323021 is a wasteful number, since it uses less digits than its factorization.

1121323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7300.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1121323021 is about 33486.1616343229. The cubic root of 1121323021 is about 1038.9075748639.

Adding to 1121323021 its reverse (1203231211), we get a palindrome (2324554232).

The spelling of 1121323021 in words is "one billion, one hundred twenty-one million, three hundred twenty-three thousand, twenty-one".