2155310152123 has 2 divisors, whose sum is σ = 2155310152124. Its totient is φ = 2155310152122.

The previous prime is 2155310152063. The next prime is 2155310152153. The reversal of 2155310152123 is 3212510135512.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2155310152123 is a prime.

It is not a weakly prime, because it can be changed into another prime (2155310152153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077655076061 + 1077655076062.

It is an arithmetic number, because the mean of its divisors is an integer number (1077655076062).

Almost surely, 2^{2155310152123} is an apocalyptic number.

2155310152123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155310152123 is an equidigital number, since it uses as much as digits as its factorization.

2155310152123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 2155310152123 its reverse (3212510135512), we get a palindrome (5367820287635).

The spelling of 2155310152123 in words is "two trillion, one hundred fifty-five billion, three hundred ten million, one hundred fifty-two thousand, one hundred twenty-three".