1133408021 has 4 divisors (see below), whose sum is σ = 1154793132. Its totient is φ = 1112022912.

The previous prime is 1133408009. The next prime is 1133408039. The reversal of 1133408021 is 1208043311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1208043311 = 41 ⋅29464471.

It can be written as a sum of positive squares in 2 ways, for example, as 975000625 + 158407396 = 31225^2 + 12586^2 .

It is a cyclic number.

It is not a de Polignac number, because 1133408021 - 2¹⁸ = 1133145877 is a prime.

It is a super-2 number, since 2×1133408021² = 2569227484134272882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133408041) 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, 10692476 + ... + 10692581.

It is an arithmetic number, because the mean of its divisors is an integer number (288698283).

Almost surely, 2^1133408021 is an apocalyptic number.

It is an amenable number.

1133408021 is a deficient number, since it is larger than the sum of its proper divisors (21385111).

1133408021 is an equidigital number, since it uses as much as digits as its factorization.

1133408021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21385110.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1133408021 is about 33666.1257200766. The cubic root of 1133408021 is about 1042.6265037882.

The spelling of 1133408021 in words is "one billion, one hundred thirty-three million, four hundred eight thousand, twenty-one".