2123411345 has 32 divisors (see below), whose sum is σ = 2845549440. Its totient is φ = 1508016640.

The previous prime is 2123411317. The next prime is 2123411347. The reversal of 2123411345 is 5431143212.

It is a happy number.

It is not a de Polignac number, because 2123411345 - 2⁸ = 2123411089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2123411347) 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 31 ways as a sum of consecutive naturals, for example, 660101 + ... + 663309.

It is an arithmetic number, because the mean of its divisors is an integer number (88923420).

Almost surely, 2^2123411345 is an apocalyptic number.

It is an amenable number.

2123411345 is a deficient number, since it is larger than the sum of its proper divisors (722138095).

2123411345 is a wasteful number, since it uses less digits than its factorization.

2123411345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505.

The product of its digits is 2880, while the sum is 26.

The square root of 2123411345 is about 46080.4876818811. The cubic root of 2123411345 is about 1285.3203327618.

Adding to 2123411345 its reverse (5431143212), we get a palindrome (7554554557).

The spelling of 2123411345 in words is "two billion, one hundred twenty-three million, four hundred eleven thousand, three hundred forty-five".