2120155423 has 2 divisors, whose sum is σ = 2120155424. Its totient is φ = 2120155422.

The previous prime is 2120155421. The next prime is 2120155487. The reversal of 2120155423 is 3245510212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120155423 - 2¹ = 2120155421 is a prime.

Together with 2120155421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120155421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060077711 + 1060077712.

It is an arithmetic number, because the mean of its divisors is an integer number (1060077712).

Almost surely, 2^2120155423 is an apocalyptic number.

2120155423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120155423 is an equidigital number, since it uses as much as digits as its factorization.

2120155423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2120155423 is about 46045.1454878796. The cubic root of 2120155423 is about 1284.6630502325.

Adding to 2120155423 its reverse (3245510212), we get a palindrome (5365665635).

The spelling of 2120155423 in words is "two billion, one hundred twenty million, one hundred fifty-five thousand, four hundred twenty-three".