11152552021 has 4 divisors (see below), whose sum is σ = 12010440652. Its totient is φ = 10294663392.

The previous prime is 11152552009. The next prime is 11152552031. The reversal of 11152552021 is 12025525111.

It is a happy number.

11152552021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12025525111 = 31319 ⋅383969.

It can be written as a sum of positive squares in 2 ways, for example, as 1328967025 + 9823584996 = 36455^2 + 99114^2 .

It is not a de Polignac number, because 11152552021 - 2⁵ = 11152551989 is a prime.

It is a super-2 number, since 2×11152552021² (a number of 21 digits) 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 (11152552031) 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 3 ways as a sum of consecutive naturals, for example, 428944296 + ... + 428944321.

It is an arithmetic number, because the mean of its divisors is an integer number (3002610163).

Almost surely, 2^11152552021 is an apocalyptic number.

It is an amenable number.

11152552021 is a deficient number, since it is larger than the sum of its proper divisors (857888631).

11152552021 is an equidigital number, since it uses as much as digits as its factorization.

11152552021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857888630.

The product of its (nonzero) digits is 1000, while the sum is 25.

The spelling of 11152552021 in words is "eleven billion, one hundred fifty-two million, five hundred fifty-two thousand, twenty-one".