10400402123 has 2 divisors, whose sum is σ = 10400402124. Its totient is φ = 10400402122.

The previous prime is 10400402107. The next prime is 10400402183. The reversal of 10400402123 is 32120400401.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10400402123 - 2⁴ = 10400402107 is a prime.

It is not a weakly prime, because it can be changed into another prime (10400402183) 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 as a sum of consecutive naturals, namely, 5200201061 + 5200201062.

It is an arithmetic number, because the mean of its divisors is an integer number (5200201062).

Almost surely, 2^10400402123 is an apocalyptic number.

10400402123 is a deficient number, since it is larger than the sum of its proper divisors (1).

10400402123 is an equidigital number, since it uses as much as digits as its factorization.

10400402123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 10400402123 its reverse (32120400401), we get a palindrome (42520802524).

The spelling of 10400402123 in words is "ten billion, four hundred million, four hundred two thousand, one hundred twenty-three".