1105251313021 has 4 divisors (see below), whose sum is σ = 1107520823392. Its totient is φ = 1102981802652.

The previous prime is 1105251312967. The next prime is 1105251313043. The reversal of 1105251313021 is 1203131525011.

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.

It is a cyclic number.

It is not a de Polignac number, because 1105251313021 - 2¹¹ = 1105251310973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105251316021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1134754455 + ... + 1134755428.

It is an arithmetic number, because the mean of its divisors is an integer number (276880205848).

Almost surely, 2^{1105251313021} is an apocalyptic number.

It is an amenable number.

1105251313021 is a deficient number, since it is larger than the sum of its proper divisors (2269510371).

1105251313021 is an equidigital number, since it uses as much as digits as its factorization.

1105251313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269510370.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 1105251313021 its reverse (1203131525011), we get a palindrome (2308382838032).

The spelling of 1105251313021 in words is "one trillion, one hundred five billion, two hundred fifty-one million, three hundred thirteen thousand, twenty-one".