1011312232103 has 4 divisors (see below), whose sum is σ = 1011348781128. Its totient is φ = 1011275683080.

The previous prime is 1011312232079. The next prime is 1011312232159. The reversal of 1011312232103 is 3012322131101.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1011312232103 - 2²⁰ = 1011311183527 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 (1011312235103) 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, 18232976 + ... + 18288357.

It is an arithmetic number, because the mean of its divisors is an integer number (252837195282).

Almost surely, 2^{1011312232103} is an apocalyptic number.

1011312232103 is a deficient number, since it is larger than the sum of its proper divisors (36549025).

1011312232103 is an equidigital number, since it uses as much as digits as its factorization.

1011312232103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36549024.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1011312232103 its reverse (3012322131101), we get a palindrome (4023634363204).

The spelling of 1011312232103 in words is "one trillion, eleven billion, three hundred twelve million, two hundred thirty-two thousand, one hundred three".