2111110201221 has 48 divisors (see below), whose sum is σ = 3452523021696. Its totient is φ = 1123681665024.

The previous prime is 2111110201183. The next prime is 2111110201223. The reversal of 2111110201221 is 1221020111112.

It is a happy number.

It is not a de Polignac number, because 2111110201221 - 2¹¹ = 2111110199173 is a prime.

It is a super-2 number, since 2×2111110201221² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2111110201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111110201223) 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, 1204356 + ... + 2381741.

It is an arithmetic number, because the mean of its divisors is an integer number (71927562952).

Almost surely, 2^{2111110201221} is an apocalyptic number.

2111110201221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2111110201221 is a deficient number, since it is larger than the sum of its proper divisors (1341412820475).

2111110201221 is a wasteful number, since it uses less digits than its factorization.

2111110201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3586238 (or 3586221 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2111110201221 its reverse (1221020111112), we get a palindrome (3332130312333).

The spelling of 2111110201221 in words is "two trillion, one hundred eleven billion, one hundred ten million, two hundred one thousand, two hundred twenty-one".