20210020120221 has 4 divisors (see below), whose sum is σ = 26946693493632. Its totient is φ = 13473346746812.

The previous prime is 20210020120219. The next prime is 20210020120229. The reversal of 20210020120221 is 12202102001202.

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 20210020120221 - 2¹ = 20210020120219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20210020120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210020120229) 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, 3368336686701 + ... + 3368336686706.

It is an arithmetic number, because the mean of its divisors is an integer number (6736673373408).

Almost surely, 2^{20210020120221} is an apocalyptic number.

It is an amenable number.

20210020120221 is a deficient number, since it is larger than the sum of its proper divisors (6736673373411).

20210020120221 is an equidigital number, since it uses as much as digits as its factorization.

20210020120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6736673373410.

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

Adding to 20210020120221 its reverse (12202102001202), we get a palindrome (32412122121423).

The spelling of 20210020120221 in words is "twenty trillion, two hundred ten billion, twenty million, one hundred twenty thousand, two hundred twenty-one".