2140442123 has 4 divisors (see below), whose sum is σ = 2233504848. Its totient is φ = 2047379400.

The previous prime is 2140442081. The next prime is 2140442141. The reversal of 2140442123 is 3212440412.

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 2140442123 - 2¹⁴ = 2140425739 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 93062701 = 2140442123 / (2 + 1 + 4 + 0 + 4 + 4 + 2 + 1 + 2 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2140444123) 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, 46531328 + ... + 46531373.

It is an arithmetic number, because the mean of its divisors is an integer number (558376212).

Almost surely, 2^2140442123 is an apocalyptic number.

2140442123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2140442123 is a deficient number, since it is larger than the sum of its proper divisors (93062725).

2140442123 is an equidigital number, since it uses as much as digits as its factorization.

2140442123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93062724.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 2140442123 is about 46264.9124391260. The cubic root of 2140442123 is about 1288.7474818626.

Adding to 2140442123 its reverse (3212440412), we get a palindrome (5352882535).

The spelling of 2140442123 in words is "two billion, one hundred forty million, four hundred forty-two thousand, one hundred twenty-three".