20120111135 has 8 divisors (see below), whose sum is σ = 24277527456. Its totient is φ = 16007159520.

The previous prime is 20120111111. The next prime is 20120111149. The reversal of 20120111135 is 53111102102.

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

It is not a de Polignac number, because 20120111135 - 2¹⁴ = 20120094751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11115179 + ... + 11116988.

It is an arithmetic number, because the mean of its divisors is an integer number (3034690932).

Almost surely, 2^20120111135 is an apocalyptic number.

20120111135 is a deficient number, since it is larger than the sum of its proper divisors (4157416321).

20120111135 is a wasteful number, since it uses less digits than its factorization.

20120111135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22232353.

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 20120111135 its reverse (53111102102), we get a palindrome (73231213237).

The spelling of 20120111135 in words is "twenty billion, one hundred twenty million, one hundred eleven thousand, one hundred thirty-five".