2312222021 has 4 divisors (see below), whose sum is σ = 2329099692. Its totient is φ = 2295344352.

The previous prime is 2312221981. The next prime is 2312222027. The reversal of 2312222021 is 1202222132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 654592225 + 1657629796 = 25585^2 + 40714^2 .

It is a cyclic number.

It is not a de Polignac number, because 2312222021 - 2¹⁰ = 2312220997 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 (2312222027) 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, 8438630 + ... + 8438903.

It is an arithmetic number, because the mean of its divisors is an integer number (582274923).

Almost surely, 2^2312222021 is an apocalyptic number.

It is an amenable number.

2312222021 is a deficient number, since it is larger than the sum of its proper divisors (16877671).

2312222021 is a wasteful number, since it uses less digits than its factorization.

2312222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16877670.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2312222021 is about 48085.5697793007. The cubic root of 2312222021 is about 1322.3401290209.

Adding to 2312222021 its reverse (1202222132), we get a palindrome (3514444153).

The spelling of 2312222021 in words is "two billion, three hundred twelve million, two hundred twenty-two thousand, twenty-one".