1101123204521 has 4 divisors (see below), whose sum is σ = 1101171117012. Its totient is φ = 1101075292032.

The previous prime is 1101123204427. The next prime is 1101123204523. The reversal of 1101123204521 is 1254023211011.

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 658798448896 + 442324755625 = 811664^2 + 665075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101123204521 - 2³⁴ = 1083943335337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101123204523) 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, 23921756 + ... + 23967741.

It is an arithmetic number, because the mean of its divisors is an integer number (275292779253).

Almost surely, 2^{1101123204521} is an apocalyptic number.

It is an amenable number.

1101123204521 is a deficient number, since it is larger than the sum of its proper divisors (47912491).

1101123204521 is an equidigital number, since it uses as much as digits as its factorization.

1101123204521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47912490.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 1101123204521 its reverse (1254023211011), we get a palindrome (2355146415532).

The spelling of 1101123204521 in words is "one trillion, one hundred one billion, one hundred twenty-three million, two hundred four thousand, five hundred twenty-one".