2112122200221 has 48 divisors (see below), whose sum is σ = 3351847599360. Its totient is φ = 1271006501760.

The previous prime is 2112122200219. The next prime is 2112122200229. The reversal of 2112122200221 is 1220022212112.

It is a happy number.

2112122200221 is a `hidden beast` number, since 2 + 11 + 212 + 220 + 0 + 221 = 666.

It is not a de Polignac number, because 2112122200221 - 2¹ = 2112122200219 is a prime.

It is a super-2 number, since 2×2112122200221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2112122200194 and 2112122200203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112122200229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8193331 + ... + 8447183.

It is an arithmetic number, because the mean of its divisors is an integer number (69830158320).

Almost surely, 2^{2112122200221} is an apocalyptic number.

It is an amenable number.

2112122200221 is a deficient number, since it is larger than the sum of its proper divisors (1239725399139).

2112122200221 is a wasteful number, since it uses less digits than its factorization.

2112122200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254466 (or 254463 counting only the distinct ones).

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

Adding to 2112122200221 its reverse (1220022212112), we get a palindrome (3332144412333).

The spelling of 2112122200221 in words is "two trillion, one hundred twelve billion, one hundred twenty-two million, two hundred thousand, two hundred twenty-one".