120111021111111 has 64 divisors (see below), whose sum is σ = 170525583728640. Its totient is φ = 75065792256000.

The previous prime is 120111021111097. The next prime is 120111021111127. The reversal of 120111021111111 is 111111120111021.

It is a happy number.

It is not a de Polignac number, because 120111021111111 - 2⁵ = 120111021111079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120111021111511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 880556331 + ... + 880692723.

It is an arithmetic number, because the mean of its divisors is an integer number (2664462245760).

Almost surely, 2^{120111021111111} is an apocalyptic number.

120111021111111 is a deficient number, since it is larger than the sum of its proper divisors (50414562617529).

120111021111111 is a wasteful number, since it uses less digits than its factorization.

120111021111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137648.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 120111021111111 its reverse (111111120111021), we get a palindrome (231222141222132).

It can be divided in two parts, 120111021 and 111111, that multiplied together give a palindrome (13345655654331).

The spelling of 120111021111111 in words is "one hundred twenty trillion, one hundred eleven billion, twenty-one million, one hundred eleven thousand, one hundred eleven".