1121332021 has 4 divisors (see below), whose sum is σ = 1128046752. Its totient is φ = 1114617292.

The previous prime is 1121332007. The next prime is 1121332099. The reversal of 1121332021 is 1202331211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1202331211 = 2711 ⋅443501.

It is a cyclic number.

It is not a de Polignac number, because 1121332021 - 2²¹ = 1119234869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121331986 and 1121332004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121332921) 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, 3357115 + ... + 3357448.

It is an arithmetic number, because the mean of its divisors is an integer number (282011688).

Almost surely, 2^1121332021 is an apocalyptic number.

It is an amenable number.

1121332021 is a deficient number, since it is larger than the sum of its proper divisors (6714731).

1121332021 is an equidigital number, since it uses as much as digits as its factorization.

1121332021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6714730.

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

The square root of 1121332021 is about 33486.2960179235. The cubic root of 1121332021 is about 1038.9103543613.

Adding to 1121332021 its reverse (1202331211), we get a palindrome (2323663232).

It can be divided in two parts, 11213 and 32021, that added together give a palindrome (43234).

The spelling of 1121332021 in words is "one billion, one hundred twenty-one million, three hundred thirty-two thousand, twenty-one".