20120120102011 has 4 divisors (see below), whose sum is σ = 20248273733392. Its totient is φ = 19991966470632.

The previous prime is 20120120102009. The next prime is 20120120102123. The reversal of 20120120102011 is 11020102102102.

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 20120120102011 - 2¹ = 20120120102009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20120120101982 and 20120120102000.

It is not an unprimeable number, because it can be changed into a prime (20120120102911) 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, 64076815455 + ... + 64076815768.

It is an arithmetic number, because the mean of its divisors is an integer number (5062068433348).

Almost surely, 2^{20120120102011} is an apocalyptic number.

20120120102011 is a deficient number, since it is larger than the sum of its proper divisors (128153631381).

20120120102011 is a wasteful number, since it uses less digits than its factorization.

20120120102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128153631380.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20120120102011 its reverse (11020102102102), we get a palindrome (31140222204113).

The spelling of 20120120102011 in words is "twenty trillion, one hundred twenty billion, one hundred twenty million, one hundred two thousand, eleven".