12122001111021 has 8 divisors (see below), whose sum is σ = 16164705576480. Its totient is φ = 8080315359792.

The previous prime is 12122001111001. The next prime is 12122001111053. The reversal of 12122001111021 is 12011110022121.

It is a happy number.

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

It is not a de Polignac number, because 12122001111021 - 2⁶ = 12122001110957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122001111001) 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, 254650791 + ... + 254698388.

It is an arithmetic number, because the mean of its divisors is an integer number (2020588197060).

Almost surely, 2^{12122001111021} is an apocalyptic number.

It is an amenable number.

12122001111021 is a deficient number, since it is larger than the sum of its proper divisors (4042704465459).

12122001111021 is an equidigital number, since it uses as much as digits as its factorization.

12122001111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509357115.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12122001111021 its reverse (12011110022121), we get a palindrome (24133111133142).

The spelling of 12122001111021 in words is "twelve trillion, one hundred twenty-two billion, one million, one hundred eleven thousand, twenty-one".