20212012120221 has 12 divisors (see below), whose sum is σ = 29220231925248. Its totient is φ = 13463088605064.

The previous prime is 20212012120213. The next prime is 20212012120231. The reversal of 20212012120221 is 12202121021202.

It is a happy number.

20212012120221 is a `hidden beast` number, since 20 + 212 + 0 + 1 + 212 + 0 + 221 = 666.

It is not a de Polignac number, because 20212012120221 - 2³ = 20212012120213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20212012120194 and 20212012120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212012120231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 965500765 + ... + 965521698.

It is an arithmetic number, because the mean of its divisors is an integer number (2435019327104).

Almost surely, 2^{20212012120221} is an apocalyptic number.

It is an amenable number.

20212012120221 is a deficient number, since it is larger than the sum of its proper divisors (9008219805027).

20212012120221 is a wasteful number, since it uses less digits than its factorization.

20212012120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931023632 (or 1931023629 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20212012120221 its reverse (12202121021202), we get a palindrome (32414133141423).

The spelling of 20212012120221 in words is "twenty trillion, two hundred twelve billion, twelve million, one hundred twenty thousand, two hundred twenty-one".