1103031320021 has 4 divisors (see below), whose sum is σ = 1103335105344. Its totient is φ = 1102727534700.

The previous prime is 1103031319991. The next prime is 1103031320033. The reversal of 1103031320021 is 1200231303011.

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 1103031320021 - 2¹⁰ = 1103031318997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103031320051) 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, 151887215 + ... + 151894476.

It is an arithmetic number, because the mean of its divisors is an integer number (275833776336).

Almost surely, 2^{1103031320021} is an apocalyptic number.

It is an amenable number.

1103031320021 is a deficient number, since it is larger than the sum of its proper divisors (303785323).

1103031320021 is an equidigital number, since it uses as much as digits as its factorization.

1103031320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303785322.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1103031320021 its reverse (1200231303011), we get a palindrome (2303262623032).

The spelling of 1103031320021 in words is "one trillion, one hundred three billion, thirty-one million, three hundred twenty thousand, twenty-one".