123014431021 has 4 divisors (see below), whose sum is σ = 123019836732. Its totient is φ = 123009025312.

The previous prime is 123014430991. The next prime is 123014431027. The reversal of 123014431021 is 120134410321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120134410321 = 16421 ⋅7315901.

It can be written as a sum of positive squares in 2 ways, for example, as 54388769796 + 68625661225 = 233214^2 + 261965^2 .

It is a cyclic number.

It is not a de Polignac number, because 123014431021 - 2⁵ = 123014430989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123014430983 and 123014431001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123014431027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2668576 + ... + 2714281.

It is an arithmetic number, because the mean of its divisors is an integer number (30754959183).

Almost surely, 2^123014431021 is an apocalyptic number.

It is an amenable number.

123014431021 is a deficient number, since it is larger than the sum of its proper divisors (5405711).

123014431021 is an equidigital number, since it uses as much as digits as its factorization.

123014431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5405710.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 123014431021 its reverse (120134410321), we get a palindrome (243148841342).

The spelling of 123014431021 in words is "one hundred twenty-three billion, fourteen million, four hundred thirty-one thousand, twenty-one".