2123002005 has 32 divisors (see below), whose sum is σ = 3570441984. Its totient is φ = 1075109376.

The previous prime is 2123002001. The next prime is 2123002009. The reversal of 2123002005 is 5002003212.

It is an interprime number because it is at equal distance from previous prime (2123002001) and next prime (2123002009).

It is not a de Polignac number, because 2123002005 - 2² = 2123002001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123002001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24807 + ... + 69723.

It is an arithmetic number, because the mean of its divisors is an integer number (111576312).

Almost surely, 2^2123002005 is an apocalyptic number.

It is an amenable number.

2123002005 is a deficient number, since it is larger than the sum of its proper divisors (1447439979).

2123002005 is a wasteful number, since it uses less digits than its factorization.

2123002005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45085.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 2123002005 is about 46076.0458915476. The cubic root of 2123002005 is about 1285.2377350371.

Adding to 2123002005 its reverse (5002003212), we get a palindrome (7125005217).

The spelling of 2123002005 in words is "two billion, one hundred twenty-three million, two thousand, five".