12212112021 has 8 divisors (see below), whose sum is σ = 16386528864. Its totient is φ = 8089551600.

The previous prime is 12212112013. The next prime is 12212112047. The reversal of 12212112021 is 12021121221.

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

It is not a de Polignac number, because 12212112021 - 2³ = 12212112013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212112001) 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, 12963555 + ... + 12964496.

It is an arithmetic number, because the mean of its divisors is an integer number (2048316108).

Almost surely, 2^12212112021 is an apocalyptic number.

It is an amenable number.

12212112021 is a deficient number, since it is larger than the sum of its proper divisors (4174416843).

12212112021 is a wasteful number, since it uses less digits than its factorization.

12212112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25928211.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12212112021 its reverse (12021121221), we get a palindrome (24233233242).

The spelling of 12212112021 in words is "twelve billion, two hundred twelve million, one hundred twelve thousand, twenty-one".