12020000021221 has 8 divisors (see below), whose sum is σ = 12236719039200. Its totient is φ = 11803714010160.

The previous prime is 12020000021213. The next prime is 12020000021261. The reversal of 12020000021221 is 12212000002021.

It is a happy number.

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 12020000021221 - 2³ = 12020000021213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020000021261) 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, 108195711 + ... + 108306748.

It is an arithmetic number, because the mean of its divisors is an integer number (1529589879900).

Almost surely, 2^{12020000021221} is an apocalyptic number.

It is an amenable number.

12020000021221 is a deficient number, since it is larger than the sum of its proper divisors (216719017979).

12020000021221 is an equidigital number, since it uses as much as digits as its factorization.

12020000021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216503459.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12020000021221 its reverse (12212000002021), we get a palindrome (24232000023242).

The spelling of 12020000021221 in words is "twelve trillion, twenty billion, twenty-one thousand, two hundred twenty-one".