1111201212111 has 16 divisors (see below), whose sum is σ = 1576637856000. Its totient is φ = 693720643968.

The previous prime is 1111201212109. The next prime is 1111201212119. The reversal of 1111201212111 is 1112121021111.

It is not a de Polignac number, because 1111201212111 - 2¹ = 1111201212109 is a prime.

It is a super-2 number, since 2×1111201212111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111201212119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54734221 + ... + 54754518.

It is an arithmetic number, because the mean of its divisors is an integer number (98539866000).

Almost surely, 2^{1111201212111} is an apocalyptic number.

1111201212111 is a deficient number, since it is larger than the sum of its proper divisors (465436643889).

1111201212111 is a wasteful number, since it uses less digits than its factorization.

1111201212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109488958.

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

Adding to 1111201212111 its reverse (1112121021111), we get a palindrome (2223322233222).

It can be divided in two parts, 111120 and 1212111, that added together give a palindrome (1323231).

The spelling of 1111201212111 in words is "one trillion, one hundred eleven billion, two hundred one million, two hundred twelve thousand, one hundred eleven".