2140402123 has 2 divisors, whose sum is σ = 2140402124. Its totient is φ = 2140402122.

The previous prime is 2140402087. The next prime is 2140402151. The reversal of 2140402123 is 3212040412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2140402123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2140402123.

It is not a weakly prime, because it can be changed into another prime (2140402183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070201061 + 1070201062.

It is an arithmetic number, because the mean of its divisors is an integer number (1070201062).

Almost surely, 2^2140402123 is an apocalyptic number.

2140402123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2140402123 is an equidigital number, since it uses as much as digits as its factorization.

2140402123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2140402123 is about 46264.4801440587. The cubic root of 2140402123 is about 1288.7394538918.

Adding to 2140402123 its reverse (3212040412), we get a palindrome (5352442535).

The spelling of 2140402123 in words is "two billion, one hundred forty million, four hundred two thousand, one hundred twenty-three".