1111122021111 has 16 divisors (see below), whose sum is σ = 1506877422720. Its totient is φ = 728061838560.

The previous prime is 1111122021091. The next prime is 1111122021127. The reversal of 1111122021111 is 1111202211111.

It is not a de Polignac number, because 1111122021111 - 2¹⁰ = 1111122020087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111122021151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425436 + ... + 1550238.

It is an arithmetic number, because the mean of its divisors is an integer number (94179838920).

Almost surely, 2^{1111122021111} is an apocalyptic number.

1111122021111 is a deficient number, since it is larger than the sum of its proper divisors (395755401609).

1111122021111 is a wasteful number, since it uses less digits than its factorization.

1111122021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130446.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1111122021111 its reverse (1111202211111), we get a palindrome (2222324232222).

The spelling of 1111122021111 in words is "one trillion, one hundred eleven billion, one hundred twenty-two million, twenty-one thousand, one hundred eleven".