212111012002221 has 24 divisors (see below), whose sum is σ = 307156935571200. Its totient is φ = 141049949252256.

The previous prime is 212111012002199. The next prime is 212111012002229. The reversal of 212111012002221 is 122200210111212.

212111012002221 is a `hidden beast` number, since 21 + 211 + 10 + 1 + 200 + 2 + 221 = 666.

It is not a de Polignac number, because 212111012002221 - 2⁹ = 212111012001709 is a prime.

It is a super-2 number, since 2×212111012002221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212111012002194 and 212111012002203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111012002229) 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, 660211980 + ... + 660533178.

It is an arithmetic number, because the mean of its divisors is an integer number (12798205648800).

Almost surely, 2^{212111012002221} is an apocalyptic number.

It is an amenable number.

212111012002221 is a deficient number, since it is larger than the sum of its proper divisors (95045923568979).

212111012002221 is a wasteful number, since it uses less digits than its factorization.

212111012002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506425 (or 506422 counting only the distinct ones).

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

Adding to 212111012002221 its reverse (122200210111212), we get a palindrome (334311222113433).

The spelling of 212111012002221 in words is "two hundred twelve trillion, one hundred eleven billion, twelve million, two thousand, two hundred twenty-one".