1150501021 has 4 divisors (see below), whose sum is σ = 1190173500. Its totient is φ = 1110828544.

The previous prime is 1150501013. The next prime is 1150501043. The reversal of 1150501021 is 1201050511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1201050511 = 419 ⋅2866469.

It can be written as a sum of positive squares in 2 ways, for example, as 410062500 + 740438521 = 20250^2 + 27211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1150501021 - 2³ = 1150501013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1150500986 and 1150501004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1150505021) 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, 19836196 + ... + 19836253.

It is an arithmetic number, because the mean of its divisors is an integer number (297543375).

Almost surely, 2^1150501021 is an apocalyptic number.

It is an amenable number.

1150501021 is a deficient number, since it is larger than the sum of its proper divisors (39672479).

1150501021 is an equidigital number, since it uses as much as digits as its factorization.

1150501021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39672478.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 1150501021 is about 33919.0362628421. The cubic root of 1150501021 is about 1047.8416802024.

Adding to 1150501021 its reverse (1201050511), we get a palindrome (2351551532).

The spelling of 1150501021 in words is "one billion, one hundred fifty million, five hundred one thousand, twenty-one".