121111041111 has 8 divisors (see below), whose sum is σ = 161625959664. Its totient is φ = 80668408320.

The previous prime is 121111041109. The next prime is 121111041127. The reversal of 121111041111 is 111140111121.

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

It is not a de Polignac number, because 121111041111 - 2¹ = 121111041109 is a prime.

It is a super-2 number, since 2×121111041111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111041131) 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, 18067530 + ... + 18074231.

It is an arithmetic number, because the mean of its divisors is an integer number (20203244958).

Almost surely, 2^121111041111 is an apocalyptic number.

121111041111 is a deficient number, since it is larger than the sum of its proper divisors (40514918553).

121111041111 is a wasteful number, since it uses less digits than its factorization.

121111041111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36142881.

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

Adding to 121111041111 its reverse (111140111121), we get a palindrome (232251152232).

The spelling of 121111041111 in words is "one hundred twenty-one billion, one hundred eleven million, forty-one thousand, one hundred eleven".