111212211101 has 16 divisors (see below), whose sum is σ = 112921344000. Its totient is φ = 109516176000.

The previous prime is 111212211007. The next prime is 111212211133. The reversal of 111212211101 is 101112212111.

It is a cyclic number.

It is not a de Polignac number, because 111212211101 - 2¹⁸ = 111211948957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212211161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23919425 + ... + 23924073.

It is an arithmetic number, because the mean of its divisors is an integer number (7057584000).

Almost surely, 2^111212211101 is an apocalyptic number.

It is an amenable number.

111212211101 is a deficient number, since it is larger than the sum of its proper divisors (1709132899).

111212211101 is a wasteful number, since it uses less digits than its factorization.

111212211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5980.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111212211101 its reverse (101112212111), we get a palindrome (212324423212).

It can be divided in two parts, 11121 and 2211101, that added together give a palindrome (2222222).

The spelling of 111212211101 in words is "one hundred eleven billion, two hundred twelve million, two hundred eleven thousand, one hundred one".