1103020353521 has 4 divisors (see below), whose sum is σ = 1103022863844. Its totient is φ = 1103017843200.

The previous prime is 1103020353493. The next prime is 1103020353557. The reversal of 1103020353521 is 1253530203011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 176635278400 + 926385075121 = 420280^2 + 962489^2 .

It is a cyclic number.

It is not a de Polignac number, because 1103020353521 - 2³⁸ = 828142446577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1103020353121) 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, 403400 + ... + 1539081.

It is an arithmetic number, because the mean of its divisors is an integer number (275755715961).

Almost surely, 2^{1103020353521} is an apocalyptic number.

It is an amenable number.

1103020353521 is a deficient number, since it is larger than the sum of its proper divisors (2510323).

1103020353521 is an equidigital number, since it uses as much as digits as its factorization.

1103020353521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510322.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 1103020353521 its reverse (1253530203011), we get a palindrome (2356550556532).

It can be divided in two parts, 1103020 and 353521, that added together give a palindrome (1456541).

The spelling of 1103020353521 in words is "one trillion, one hundred three billion, twenty million, three hundred fifty-three thousand, five hundred twenty-one".