212100112120221 has 48 divisors (see below), whose sum is σ = 345706985175552. Its totient is φ = 124330183718400.

The previous prime is 212100112120189. The next prime is 212100112120223. The reversal of 212100112120221 is 122021211001212.

212100112120221 is a `hidden beast` number, since 2 + 1 + 210 + 0 + 112 + 120 + 221 = 666.

It is not a de Polignac number, because 212100112120221 - 2⁵ = 212100112120189 is a prime.

It is a super-2 number, since 2×212100112120221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212100112120194 and 212100112120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100112120223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 162874965 + ... + 164172026.

It is an arithmetic number, because the mean of its divisors is an integer number (7202228857824).

Almost surely, 2^{212100112120221} is an apocalyptic number.

It is an amenable number.

212100112120221 is a deficient number, since it is larger than the sum of its proper divisors (133606873055331).

212100112120221 is a wasteful number, since it uses less digits than its factorization.

212100112120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327047274 (or 327047271 counting only the distinct ones).

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

Adding to 212100112120221 its reverse (122021211001212), we get a palindrome (334121323121433).

The spelling of 212100112120221 in words is "two hundred twelve trillion, one hundred billion, one hundred twelve million, one hundred twenty thousand, two hundred twenty-one".