2111112011221 has 8 divisors (see below), whose sum is σ = 2138340596184. Its totient is φ = 2084007475200.

The previous prime is 2111112011209. The next prime is 2111112011243. The reversal of 2111112011221 is 1221102111112.

It can be written as a sum of positive squares in 4 ways, for example, as 1072231256196 + 1038880755025 = 1035486^2 + 1019255^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111112011221 - 2¹³ = 2111112003029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111112011195 and 2111112011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111112011521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30977980 + ... + 31046053.

It is an arithmetic number, because the mean of its divisors is an integer number (267292574523).

Almost surely, 2^{2111112011221} is an apocalyptic number.

It is an amenable number.

2111112011221 is a deficient number, since it is larger than the sum of its proper divisors (27228584963).

2111112011221 is a wasteful number, since it uses less digits than its factorization.

2111112011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62024471.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 2111112011221 its reverse (1221102111112), we get a palindrome (3332214122333).

The spelling of 2111112011221 in words is "two trillion, one hundred eleven billion, one hundred twelve million, eleven thousand, two hundred twenty-one".