12302212021 has 4 divisors (see below), whose sum is σ = 13420594944. Its totient is φ = 11183829100.

The previous prime is 12302211949. The next prime is 12302212031. The reversal of 12302212021 is 12021220321.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 12302212021 - 2¹⁹ = 12301687733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12302211986 and 12302212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12302212031) 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, 559191445 + ... + 559191466.

It is an arithmetic number, because the mean of its divisors is an integer number (3355148736).

Almost surely, 2^12302212021 is an apocalyptic number.

12302212021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12302212021 is a deficient number, since it is larger than the sum of its proper divisors (1118382923).

12302212021 is a wasteful number, since it uses less digits than its factorization.

12302212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118382922.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12302212021 its reverse (12021220321), we get a palindrome (24323432342).

The spelling of 12302212021 in words is "twelve billion, three hundred two million, two hundred twelve thousand, twenty-one".