2111202011221 has 8 divisors (see below), whose sum is σ = 2163618675288. Its totient is φ = 2058829344000.

The previous prime is 2111202011203. The next prime is 2111202011273. The reversal of 2111202011221 is 1221102021112.

It can be written as a sum of positive squares in 4 ways, for example, as 135560930596 + 1975641080625 = 368186^2 + 1405575^2 .

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 2111202011221 - 2²⁷ = 2111067793493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111202011195 and 2111202011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111202011521) 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, 10902040 + ... + 11094001.

It is an arithmetic number, because the mean of its divisors is an integer number (270452334411).

Almost surely, 2^{2111202011221} is an apocalyptic number.

It is an amenable number.

2111202011221 is a deficient number, since it is larger than the sum of its proper divisors (52416664067).

2111202011221 is a wasteful number, since it uses less digits than its factorization.

2111202011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21998423.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2111202011221 its reverse (1221102021112), we get a palindrome (3332304032333).

The spelling of 2111202011221 in words is "two trillion, one hundred eleven billion, two hundred two million, eleven thousand, two hundred twenty-one".