1210120111111 has 8 divisors (see below), whose sum is σ = 1222648474320. Its totient is φ = 1197592827648.

The previous prime is 1210120111103. The next prime is 1210120111159. The reversal of 1210120111111 is 1111110210121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1210120111111 - 2³ = 1210120111103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210120111091 and 1210120111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210120171111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2089320 + ... + 2604898.

It is an arithmetic number, because the mean of its divisors is an integer number (152831059290).

Almost surely, 2^{1210120111111} is an apocalyptic number.

1210120111111 is a deficient number, since it is larger than the sum of its proper divisors (12528363209).

1210120111111 is an equidigital number, since it uses as much as digits as its factorization.

1210120111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539873.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1210120111111 its reverse (1111110210121), we get a palindrome (2321230321232).

It can be divided in two parts, 1210120 and 111111, that added together give a palindrome (1321231).

The spelling of 1210120111111 in words is "one trillion, two hundred ten billion, one hundred twenty million, one hundred eleven thousand, one hundred eleven".