120021021111 has 16 divisors (see below), whose sum is σ = 162551854080. Its totient is φ = 78760165440.

The previous prime is 120021021077. The next prime is 120021021137. The reversal of 120021021111 is 111120120021.

It is not a de Polignac number, because 120021021111 - 2⁷ = 120021020983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021021151) 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, 948345 + ... + 1067426.

It is an arithmetic number, because the mean of its divisors is an integer number (10159490880).

Almost surely, 2^120021021111 is an apocalyptic number.

120021021111 is a deficient number, since it is larger than the sum of its proper divisors (42530832969).

120021021111 is a wasteful number, since it uses less digits than its factorization.

120021021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016086.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 120021021111 its reverse (111120120021), we get a palindrome (231141141132).

The spelling of 120021021111 in words is "one hundred twenty billion, twenty-one million, twenty-one thousand, one hundred eleven".