2111102212221 has 16 divisors (see below), whose sum is σ = 3130163009920. Its totient is φ = 1406229595200.

The previous prime is 2111102212217. The next prime is 2111102212223. The reversal of 2111102212221 is 1222122011112.

2111102212221 is a `hidden beast` number, since 211 + 1 + 10 + 221 + 2 + 221 = 666.

It is not a de Polignac number, because 2111102212221 - 2² = 2111102212217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111102212194 and 2111102212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111102212223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32519185 + ... + 32584038.

It is an arithmetic number, because the mean of its divisors is an integer number (195635188120).

Almost surely, 2^{2111102212221} is an apocalyptic number.

It is an amenable number.

2111102212221 is a deficient number, since it is larger than the sum of its proper divisors (1019060797699).

2111102212221 is a wasteful number, since it uses less digits than its factorization.

2111102212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65104433 (or 65104427 counting only the distinct ones).

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

Adding to 2111102212221 its reverse (1222122011112), we get a palindrome (3333224223333).

The spelling of 2111102212221 in words is "two trillion, one hundred eleven billion, one hundred two million, two hundred twelve thousand, two hundred twenty-one".