12122012021 has 8 divisors (see below), whose sum is σ = 13990894464. Its totient is φ = 10287421200.

The previous prime is 12122012009. The next prime is 12122012041. The reversal of 12122012021 is 12021022121.

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

It is not a de Polignac number, because 12122012021 - 2¹⁴ = 12121995637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12122011987 and 12122012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122012041) 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, 8572145 + ... + 8573558.

It is an arithmetic number, because the mean of its divisors is an integer number (1748861808).

Almost surely, 2^12122012021 is an apocalyptic number.

It is an amenable number.

12122012021 is a deficient number, since it is larger than the sum of its proper divisors (1868882443).

12122012021 is a wasteful number, since it uses less digits than its factorization.

12122012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17145811.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12122012021 its reverse (12021022121), we get a palindrome (24143034142).

The spelling of 12122012021 in words is "twelve billion, one hundred twenty-two million, twelve thousand, twenty-one".