2012120121221 has 8 divisors (see below), whose sum is σ = 2300122816320. Its totient is φ = 1724256667008.

The previous prime is 2012120121211. The next prime is 2012120121241. The reversal of 2012120121221 is 1221210212102.

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

It is a cyclic number.

It is not a de Polignac number, because 2012120121221 - 2²² = 2012115926917 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2012120121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012120121211) 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, 34779251 + ... + 34837056.

It is an arithmetic number, because the mean of its divisors is an integer number (287515352040).

Almost surely, 2^{2012120121221} is an apocalyptic number.

It is an amenable number.

2012120121221 is a deficient number, since it is larger than the sum of its proper divisors (288002695099).

2012120121221 is an equidigital number, since it uses as much as digits as its factorization.

2012120121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69620443.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2012120121221 its reverse (1221210212102), we get a palindrome (3233330333323).

The spelling of 2012120121221 in words is "two trillion, twelve billion, one hundred twenty million, one hundred twenty-one thousand, two hundred twenty-one".