2020012120221 has 4 divisors (see below), whose sum is σ = 2693349493632. Its totient is φ = 1346674746812.

The previous prime is 2020012120199. The next prime is 2020012120241. The reversal of 2020012120221 is 1220212100202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2020012120221 - 2¹⁵ = 2020012087453 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 2020012120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020012120241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336668686701 + ... + 336668686706.

It is an arithmetic number, because the mean of its divisors is an integer number (673337373408).

Almost surely, 2^{2020012120221} is an apocalyptic number.

It is an amenable number.

2020012120221 is a deficient number, since it is larger than the sum of its proper divisors (673337373411).

2020012120221 is an equidigital number, since it uses as much as digits as its factorization.

2020012120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673337373410.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2020012120221 its reverse (1220212100202), we get a palindrome (3240224220423).

The spelling of 2020012120221 in words is "two trillion, twenty billion, twelve million, one hundred twenty thousand, two hundred twenty-one".