1113431123021 has 32 divisors (see below), whose sum is σ = 1438621544448. Its totient is φ = 839195723520.

The previous prime is 1113431122957. The next prime is 1113431123033. The reversal of 1113431123021 is 1203211343111.

It is not a de Polignac number, because 1113431123021 - 2⁶ = 1113431122957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113431123621) 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 31 ways as a sum of consecutive naturals, for example, 4612625 + ... + 4848006.

It is an arithmetic number, because the mean of its divisors is an integer number (44956923264).

Almost surely, 2^{1113431123021} is an apocalyptic number.

It is an amenable number.

1113431123021 is a deficient number, since it is larger than the sum of its proper divisors (325190421427).

1113431123021 is a wasteful number, since it uses less digits than its factorization.

1113431123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9460721.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 1113431123021 its reverse (1203211343111), we get a palindrome (2316642466132).

The spelling of 1113431123021 in words is "one trillion, one hundred thirteen billion, four hundred thirty-one million, one hundred twenty-three thousand, twenty-one".