20120200111121 has 4 divisors (see below), whose sum is σ = 21949309212144. Its totient is φ = 18291091010100.

The previous prime is 20120200111069. The next prime is 20120200111127. The reversal of 20120200111121 is 12111100202102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20120200111121 - 2²² = 20120195916817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20120200111096 and 20120200111105.

It is not an unprimeable number, because it can be changed into a prime (20120200111127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914554550495 + ... + 914554550516.

It is an arithmetic number, because the mean of its divisors is an integer number (5487327303036).

Almost surely, 2^{20120200111121} is an apocalyptic number.

It is an amenable number.

20120200111121 is a deficient number, since it is larger than the sum of its proper divisors (1829109101023).

20120200111121 is a wasteful number, since it uses less digits than its factorization.

20120200111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829109101022.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20120200111121 its reverse (12111100202102), we get a palindrome (32231300313223).

The spelling of 20120200111121 in words is "twenty trillion, one hundred twenty billion, two hundred million, one hundred eleven thousand, one hundred twenty-one".