1011431103423 has 16 divisors (see below), whose sum is σ = 1487733557856. Its totient is φ = 607238184960.

The previous prime is 1011431103383. The next prime is 1011431103443. The reversal of 1011431103423 is 3243011341101.

It is a happy number.

It is not a de Polignac number, because 1011431103423 - 2⁸ = 1011431103167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011431103393 and 1011431103402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011431103443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316268290 + ... + 316271487.

It is an arithmetic number, because the mean of its divisors is an integer number (92983347366).

Almost surely, 2^{1011431103423} is an apocalyptic number.

1011431103423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1011431103423 is a deficient number, since it is larger than the sum of its proper divisors (476302454433).

1011431103423 is a wasteful number, since it uses less digits than its factorization.

1011431103423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632539834.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 1011431103423 its reverse (3243011341101), we get a palindrome (4254442444524).

The spelling of 1011431103423 in words is "one trillion, eleven billion, four hundred thirty-one million, one hundred three thousand, four hundred twenty-three".