1102521521 has 4 divisors (see below), whose sum is σ = 1107378672. Its totient is φ = 1097664372.

The previous prime is 1102521467. The next prime is 1102521527. The reversal of 1102521521 is 1251252011.

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: 1251252011 = 19 ⋅65855369.

It is a cyclic number.

It is not a de Polignac number, because 1102521521 - 2⁶ = 1102521457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102521493 and 1102521502.

It is not an unprimeable number, because it can be changed into a prime (1102521527) 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, 2428235 + ... + 2428688.

It is an arithmetic number, because the mean of its divisors is an integer number (276844668).

Almost surely, 2^1102521521 is an apocalyptic number.

It is an amenable number.

1102521521 is a deficient number, since it is larger than the sum of its proper divisors (4857151).

1102521521 is an equidigital number, since it uses as much as digits as its factorization.

1102521521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4857150.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1102521521 is about 33204.2395034128. The cubic root of 1102521521 is about 1033.0682759524.

Adding to 1102521521 its reverse (1251252011), we get a palindrome (2353773532).

The spelling of 1102521521 in words is "one billion, one hundred two million, five hundred twenty-one thousand, five hundred twenty-one".