120121112111 has 16 divisors (see below), whose sum is σ = 161281494528. Its totient is φ = 86400799200.

The previous prime is 120121112087. The next prime is 120121112119. The reversal of 120121112111 is 111211121021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120121112111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121112119) 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, 59999555 + ... + 60001556.

It is an arithmetic number, because the mean of its divisors is an integer number (10080093408).

Almost surely, 2^120121112111 is an apocalyptic number.

120121112111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120121112111 is a deficient number, since it is larger than the sum of its proper divisors (41160382417).

120121112111 is a wasteful number, since it uses less digits than its factorization.

120121112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120001142.

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

Adding to 120121112111 its reverse (111211121021), we get a palindrome (231332233132).

It can be divided in two parts, 120121 and 112111, that added together give a palindrome (232232).

The spelling of 120121112111 in words is "one hundred twenty billion, one hundred twenty-one million, one hundred twelve thousand, one hundred eleven".