1123532021 has 2 divisors, whose sum is σ = 1123532022. Its totient is φ = 1123532020.

The previous prime is 1123532009. The next prime is 1123532027. The reversal of 1123532021 is 1202353211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 751582225 + 371949796 = 27415^2 + 19286^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123532021 - 2¹⁴ = 1123515637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123531984 and 1123532002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123532027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561766010 + 561766011.

It is an arithmetic number, because the mean of its divisors is an integer number (561766011).

Almost surely, 2^1123532021 is an apocalyptic number.

It is an amenable number.

1123532021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123532021 is an equidigital number, since it uses as much as digits as its factorization.

1123532021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1123532021 is about 33519.1291802159. The cubic root of 1123532021 is about 1039.5893413803.

Adding to 1123532021 its reverse (1202353211), we get a palindrome (2325885232).

The spelling of 1123532021 in words is "one billion, one hundred twenty-three million, five hundred thirty-two thousand, twenty-one".