11221121031111 has 24 divisors (see below), whose sum is σ = 16218395968320. Its totient is φ = 7476082670016.

The previous prime is 11221121031077. The next prime is 11221121031137. The reversal of 11221121031111 is 11113012112211.

11221121031111 is a `hidden beast` number, since 1 + 1 + 221 + 121 + 0 + 311 + 11 = 666.

It is not a de Polignac number, because 11221121031111 - 2⁶ = 11221121031047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221121031011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95628385 + ... + 95745653.

It is an arithmetic number, because the mean of its divisors is an integer number (675766498680).

Almost surely, 2^{11221121031111} is an apocalyptic number.

11221121031111 is a deficient number, since it is larger than the sum of its proper divisors (4997274937209).

11221121031111 is a wasteful number, since it uses less digits than its factorization.

11221121031111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123815 (or 123812 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 18.

Adding to 11221121031111 its reverse (11113012112211), we get a palindrome (22334133143322).

The spelling of 11221121031111 in words is "eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, thirty-one thousand, one hundred eleven".