20121120011111 has 8 divisors (see below), whose sum is σ = 23223244596384. Its totient is φ = 17075915143200.

The previous prime is 20121120010963. The next prime is 20121120011197. The reversal of 20121120011111 is 11111002112102.

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 20121120011111 - 2¹⁴ = 20121119994727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121120011611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14229928580 + ... + 14229929993.

It is an arithmetic number, because the mean of its divisors is an integer number (2902905574548).

Almost surely, 2^{20121120011111} is an apocalyptic number.

20121120011111 is a deficient number, since it is larger than the sum of its proper divisors (3102124585273).

20121120011111 is a wasteful number, since it uses less digits than its factorization.

20121120011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28459858681.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20121120011111 its reverse (11111002112102), we get a palindrome (31232122123213).

The spelling of 20121120011111 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, eleven thousand, one hundred eleven".