212111012020221 has 12 divisors (see below), whose sum is σ = 306468370380640. Its totient is φ = 141367742517960.

The previous prime is 212111012020211. The next prime is 212111012020241. The reversal of 212111012020221 is 122020210111212.

212111012020221 is a `hidden beast` number, since 21 + 211 + 10 + 1 + 202 + 0 + 221 = 666.

It is not a de Polignac number, because 212111012020221 - 2¹⁴ = 212111012003837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212111012020194 and 212111012020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111012020211) 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, 3299868481 + ... + 3299932758.

Almost surely, 2^{212111012020221} is an apocalyptic number.

It is an amenable number.

212111012020221 is a deficient number, since it is larger than the sum of its proper divisors (94357358360419).

212111012020221 is a wasteful number, since it uses less digits than its factorization.

212111012020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6599804816 (or 6599804813 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212111012020221 its reverse (122020210111212), we get a palindrome (334131222131433).

The spelling of 212111012020221 in words is "two hundred twelve trillion, one hundred eleven billion, twelve million, twenty thousand, two hundred twenty-one".