20120111121 has 16 divisors (see below), whose sum is σ = 29555379648. Its totient is φ = 12073272000.

The previous prime is 20120111111. The next prime is 20120111149. The reversal of 20120111121 is 12111102102.

It is not a de Polignac number, because 20120111121 - 2⁹ = 20120110609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20120111097 and 20120111106.

It is not an unprimeable number, because it can be changed into a prime (20120111111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3014986 + ... + 3021651.

It is an arithmetic number, because the mean of its divisors is an integer number (1847211228).

Almost surely, 2^20120111121 is an apocalyptic number.

It is an amenable number.

20120111121 is a deficient number, since it is larger than the sum of its proper divisors (9435268527).

20120111121 is a wasteful number, since it uses less digits than its factorization.

20120111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6036752.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20120111121 its reverse (12111102102), we get a palindrome (32231213223).

The spelling of 20120111121 in words is "twenty billion, one hundred twenty million, one hundred eleven thousand, one hundred twenty-one".