2011002111221 has 8 divisors (see below), whose sum is σ = 2060196644184. Its totient is φ = 1961814516480.

The previous prime is 2011002111179. The next prime is 2011002111259. The reversal of 2011002111221 is 1221112001102.

It can be written as a sum of positive squares in 4 ways, for example, as 421864539121 + 1589137572100 = 649511^2 + 1260610^2 .

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 2011002111221 - 2¹⁰ = 2011002110197 is a prime.

It is a super-2 number, since 2×2011002111221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2011002111196 and 2011002111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011002111121) 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, 1145360 + ... + 2309513.

It is an arithmetic number, because the mean of its divisors is an integer number (257524580523).

Almost surely, 2^{2011002111221} is an apocalyptic number.

It is an amenable number.

2011002111221 is a deficient number, since it is larger than the sum of its proper divisors (49194532963).

2011002111221 is a wasteful number, since it uses less digits than its factorization.

2011002111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469111.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2011002111221 its reverse (1221112001102), we get a palindrome (3232114112323).

The spelling of 2011002111221 in words is "two trillion, eleven billion, two million, one hundred eleven thousand, two hundred twenty-one".