2123123019 has 4 divisors (see below), whose sum is σ = 2830830696. Its totient is φ = 1415415344.

The previous prime is 2123122961. The next prime is 2123123059. The reversal of 2123123019 is 9103213212.

2123123019 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2123123019 - 2⁸ = 2123122763 is a prime.

It is a super-2 number, since 2×2123123019² = 9015302707615348722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2123123019.

It is not an unprimeable number, because it can be changed into a prime (2123123059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353853834 + ... + 353853839.

It is an arithmetic number, because the mean of its divisors is an integer number (707707674).

Almost surely, 2^2123123019 is an apocalyptic number.

2123123019 is a deficient number, since it is larger than the sum of its proper divisors (707707677).

2123123019 is an equidigital number, since it uses as much as digits as its factorization.

2123123019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707707676.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 2123123019 is about 46077.3590714572. The cubic root of 2123123019 is about 1285.2621546724.

The spelling of 2123123019 in words is "two billion, one hundred twenty-three million, one hundred twenty-three thousand, nineteen".