2121030023 has 8 divisors (see below), whose sum is σ = 2473504800. Its totient is φ = 1818025440.

The previous prime is 2121029987. The next prime is 2121030029. The reversal of 2121030023 is 3200301212.

It is a happy number.

It is not a de Polignac number, because 2121030023 - 2⁸ = 2121029767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121030029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3091538 + ... + 3092223.

It is an arithmetic number, because the mean of its divisors is an integer number (309188100).

Almost surely, 2^2121030023 is an apocalyptic number.

2121030023 is a deficient number, since it is larger than the sum of its proper divisors (352474777).

2121030023 is an frugal number, since it uses more digits than its factorization.

2121030023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6183782 (or 6183768 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2121030023 is about 46054.6417096040. The cubic root of 2121030023 is about 1284.8396743658.

Adding to 2121030023 its reverse (3200301212), we get a palindrome (5321331235).

The spelling of 2121030023 in words is "two billion, one hundred twenty-one million, thirty thousand, twenty-three".