120102211111 has 4 divisors (see below), whose sum is σ = 122895285832. Its totient is φ = 117309136392.

The previous prime is 120102211109. The next prime is 120102211121. The reversal of 120102211111 is 111112201021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120102211111 - 2¹ = 120102211109 is a prime.

It is a super-3 number, since 3×120102211111³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120102211091 and 120102211100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120102211121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1396537296 + ... + 1396537381.

It is an arithmetic number, because the mean of its divisors is an integer number (30723821458).

Almost surely, 2^120102211111 is an apocalyptic number.

120102211111 is a deficient number, since it is larger than the sum of its proper divisors (2793074721).

120102211111 is an equidigital number, since it uses as much as digits as its factorization.

120102211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793074720.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 120102211111 its reverse (111112201021), we get a palindrome (231214412132).

The spelling of 120102211111 in words is "one hundred twenty billion, one hundred two million, two hundred eleven thousand, one hundred eleven".