1121132021 has 8 divisors (see below), whose sum is σ = 1135272600. Its totient is φ = 1107025920.

The previous prime is 1121131981. The next prime is 1121132027. The reversal of 1121132021 is 1202311211.

It can be written as a sum of positive squares in 4 ways, for example, as 51122500 + 1070009521 = 7150^2 + 32711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121132021 - 2¹⁸ = 1120869877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121131987 and 1121132005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121132027) 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 7 ways as a sum of consecutive naturals, for example, 60251 + ... + 76631.

It is an arithmetic number, because the mean of its divisors is an integer number (141909075).

Almost surely, 2^1121132021 is an apocalyptic number.

It is an amenable number.

1121132021 is a deficient number, since it is larger than the sum of its proper divisors (14140579).

1121132021 is an equidigital number, since it uses as much as digits as its factorization.

1121132021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17239.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1121132021 is about 33483.3095885099. The cubic root of 1121132021 is about 1038.8485842458.

Adding to 1121132021 its reverse (1202311211), we get a palindrome (2323443232).

The spelling of 1121132021 in words is "one billion, one hundred twenty-one million, one hundred thirty-two thousand, twenty-one".