1121112212111 has 8 divisors (see below), whose sum is σ = 1187106063120. Its totient is φ = 1055123480448.

The previous prime is 1121112212107. The next prime is 1121112212123. The reversal of 1121112212111 is 1112122111211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121112212111 - 2² = 1121112212107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121112212111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121112212141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824321 + ... + 1709306.

It is an arithmetic number, because the mean of its divisors is an integer number (148388257890).

Almost surely, 2^{1121112212111} is an apocalyptic number.

1121112212111 is a deficient number, since it is larger than the sum of its proper divisors (65993851009).

1121112212111 is a wasteful number, since it uses less digits than its factorization.

1121112212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559673.

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

Adding to 1121112212111 its reverse (1112122111211), we get a palindrome (2233234323322).

The spelling of 1121112212111 in words is "one trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand, one hundred eleven".