111121001111 has 8 divisors (see below), whose sum is σ = 114957873120. Its totient is φ = 107284470048.

The previous prime is 111121001099. The next prime is 111121001197. The reversal of 111121001111 is 111100121111.

It is a happy number.

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 111121001111 - 2¹⁰ = 111121000087 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111121001092 and 111121001101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121001711) 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, 700865 + ... + 844661.

It is an arithmetic number, because the mean of its divisors is an integer number (14369734140).

Almost surely, 2^111121001111 is an apocalyptic number.

111121001111 is a deficient number, since it is larger than the sum of its proper divisors (3836872009).

111121001111 is a wasteful number, since it uses less digits than its factorization.

111121001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170473.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 111121001111 its reverse (111100121111), we get a palindrome (222221122222).

The spelling of 111121001111 in words is "one hundred eleven billion, one hundred twenty-one million, one thousand, one hundred eleven".