1112212121111 has 32 divisors (see below), whose sum is σ = 1374639009408. Its totient is φ = 876289720320.

The previous prime is 1112212121087. The next prime is 1112212121149. The reversal of 1112212121111 is 1111212122111.

It is not a de Polignac number, because 1112212121111 - 2¹⁰ = 1112212120087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1112212121111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112212121011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104791841 + ... + 104802453.

It is an arithmetic number, because the mean of its divisors is an integer number (42957469044).

Almost surely, 2^{1112212121111} is an apocalyptic number.

1112212121111 is a deficient number, since it is larger than the sum of its proper divisors (262426888297).

1112212121111 is a wasteful number, since it uses less digits than its factorization.

1112212121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15371.

The product of its digits is 16, while the sum is 17.

Adding to 1112212121111 its reverse (1111212122111), we get a palindrome (2223424243222).

The spelling of 1112212121111 in words is "one trillion, one hundred twelve billion, two hundred twelve million, one hundred twenty-one thousand, one hundred eleven".