2212100212221 has 24 divisors (see below), whose sum is σ = 3371231111040. Its totient is φ = 1393874308800.

The previous prime is 2212100212141. The next prime is 2212100212229. The reversal of 2212100212221 is 1222120012122.

It is a happy number.

2212100212221 is a `hidden beast` number, since 2 + 21 + 210 + 0 + 212 + 221 = 666.

It is not a de Polignac number, because 2212100212221 - 2¹³ = 2212100204029 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2212100212194 and 2212100212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212100212229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14933560 + ... + 15080961.

It is an arithmetic number, because the mean of its divisors is an integer number (140467962960).

Almost surely, 2^{2212100212221} is an apocalyptic number.

It is an amenable number.

2212100212221 is a deficient number, since it is larger than the sum of its proper divisors (1159130898819).

2212100212221 is a wasteful number, since it uses less digits than its factorization.

2212100212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30014977 (or 30014974 counting only the distinct ones).

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

Adding to 2212100212221 its reverse (1222120012122), we get a palindrome (3434220224343).

The spelling of 2212100212221 in words is "two trillion, two hundred twelve billion, one hundred million, two hundred twelve thousand, two hundred twenty-one".