2312040021 has 16 divisors (see below), whose sum is σ = 3136773120. Its totient is φ = 1514363760.

The previous prime is 2312040019. The next prime is 2312040043. The reversal of 2312040021 is 1200402132.

It is not a de Polignac number, because 2312040021 - 2¹ = 2312040019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312040011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480996 + ... + 485778.

It is an arithmetic number, because the mean of its divisors is an integer number (196048320).

Almost surely, 2^2312040021 is an apocalyptic number.

It is an amenable number.

2312040021 is a deficient number, since it is larger than the sum of its proper divisors (824733099).

2312040021 is a wasteful number, since it uses less digits than its factorization.

2312040021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7576.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2312040021 is about 48083.6772824209. The cubic root of 2312040021 is about 1322.3054333593.

Adding to 2312040021 its reverse (1200402132), we get a palindrome (3512442153).

The spelling of 2312040021 in words is "two billion, three hundred twelve million, forty thousand, twenty-one".