2312200021 has 4 divisors (see below), whose sum is σ = 2312301600. Its totient is φ = 2312098444.

The previous prime is 2312200013. The next prime is 2312200027. The reversal of 2312200021 is 1200022132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2312200021 - 2³ = 2312200013 is a prime.

It is a super-2 number, since 2×2312200021² = 10692537874224800882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2312199974 and 2312200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312200027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870 + ... + 68008.

It is an arithmetic number, because the mean of its divisors is an integer number (578075400).

Almost surely, 2^2312200021 is an apocalyptic number.

It is an amenable number.

2312200021 is a deficient number, since it is larger than the sum of its proper divisors (101579).

2312200021 is an equidigital number, since it uses as much as digits as its factorization.

2312200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101578.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2312200021 is about 48085.3410198992. The cubic root of 2312200021 is about 1322.3359351365.

Adding to 2312200021 its reverse (1200022132), we get a palindrome (3512222153).

The spelling of 2312200021 in words is "two billion, three hundred twelve million, two hundred thousand, twenty-one".