2312320021 has 8 divisors (see below), whose sum is σ = 2538599904. Its totient is φ = 2088718320.

The previous prime is 2312319983. The next prime is 2312320037. The reversal of 2312320021 is 1200232132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2312320021 - 2¹³ = 2312311829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2312319977 and 2312320004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312320061) 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, 667735 + ... + 671188.

It is an arithmetic number, because the mean of its divisors is an integer number (317324988).

Almost surely, 2^2312320021 is an apocalyptic number.

It is an amenable number.

2312320021 is a deficient number, since it is larger than the sum of its proper divisors (226279883).

2312320021 is a wasteful number, since it uses less digits than its factorization.

2312320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339091.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2312320021 is about 48086.5887852320. The cubic root of 2312320021 is about 1322.3588105461.

Adding to 2312320021 its reverse (1200232132), we get a palindrome (3512552153).

The spelling of 2312320021 in words is "two billion, three hundred twelve million, three hundred twenty thousand, twenty-one".