121011100111 has 16 divisors (see below), whose sum is σ = 140235004800. Its totient is φ = 103263919200.

The previous prime is 121011100109. The next prime is 121011100121. The reversal of 121011100111 is 111001110121.

It is a cyclic number.

It is not a de Polignac number, because 121011100111 - 2¹ = 121011100109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011100121) 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, 2633185 + ... + 2678746.

It is an arithmetic number, because the mean of its divisors is an integer number (8764687800).

Almost surely, 2^121011100111 is an apocalyptic number.

121011100111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121011100111 is a deficient number, since it is larger than the sum of its proper divisors (19223904689).

121011100111 is a wasteful number, since it uses less digits than its factorization.

121011100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5312070.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 121011100111 its reverse (111001110121), we get a palindrome (232012210232).

It can be divided in two parts, 121011 and 100111, that added together give a palindrome (221122).

The spelling of 121011100111 in words is "one hundred twenty-one billion, eleven million, one hundred thousand, one hundred eleven".