12102232021 has 4 divisors (see below), whose sum is σ = 13202434944. Its totient is φ = 11002029100.

The previous prime is 12102232019. The next prime is 12102232027. The reversal of 12102232021 is 12023220121.

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 12102232021 - 2¹ = 12102232019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12102231986 and 12102232004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102232027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550101445 + ... + 550101466.

It is an arithmetic number, because the mean of its divisors is an integer number (3300608736).

Almost surely, 2^12102232021 is an apocalyptic number.

12102232021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12102232021 is a deficient number, since it is larger than the sum of its proper divisors (1100202923).

12102232021 is a wasteful number, since it uses less digits than its factorization.

12102232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100202922.

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

Adding to 12102232021 its reverse (12023220121), we get a palindrome (24125452142).

The spelling of 12102232021 in words is "twelve billion, one hundred two million, two hundred thirty-two thousand, twenty-one".