1211120122111 has 8 divisors (see below), whose sum is σ = 1229215250480. Its totient is φ = 1193025544128.

The previous prime is 1211120122097. The next prime is 1211120122151. The reversal of 1211120122111 is 1112210211121.

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 1211120122111 - 2³⁷ = 1073681168639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211120122151) 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, 7183285 + ... + 7349953.

It is an arithmetic number, because the mean of its divisors is an integer number (153651906310).

Almost surely, 2^{1211120122111} is an apocalyptic number.

1211120122111 is a deficient number, since it is larger than the sum of its proper divisors (18095128369).

1211120122111 is a wasteful number, since it uses less digits than its factorization.

1211120122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275193.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1211120122111 its reverse (1112210211121), we get a palindrome (2323330333232).

The spelling of 1211120122111 in words is "one trillion, two hundred eleven billion, one hundred twenty million, one hundred twenty-two thousand, one hundred eleven".