11112012221221 has 6 divisors (see below), whose sum is σ = 11147176567730. Its totient is φ = 11076958454736.

The previous prime is 11112012221131. The next prime is 11112012221239. The reversal of 11112012221221 is 12212221021111.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 89984196 + 11111922237025 = 9486^2 + 3333455^2 .

It is not a de Polignac number, because 11112012221221 - 2¹⁷ = 11112012090149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112012221021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55189206 + ... + 55390183.

Almost surely, 2^{11112012221221} is an apocalyptic number.

It is an amenable number.

11112012221221 is a deficient number, since it is larger than the sum of its proper divisors (35164346509).

11112012221221 is an frugal number, since it uses more digits than its factorization.

11112012221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110580023 (or 110579706 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11112012221221 its reverse (12212221021111), we get a palindrome (23324233242332).

The spelling of 11112012221221 in words is "eleven trillion, one hundred twelve billion, twelve million, two hundred twenty-one thousand, two hundred twenty-one".