200120111121 has 16 divisors (see below), whose sum is σ = 304953724800. Its totient is φ = 114351051648.

The previous prime is 200120111117. The next prime is 200120111129. The reversal of 200120111121 is 121111021002.

It is not a de Polignac number, because 200120111121 - 2² = 200120111117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200120111097 and 200120111106.

It is not an unprimeable number, because it can be changed into a prime (200120111129) 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, 737845 + ... + 971933.

It is an arithmetic number, because the mean of its divisors is an integer number (19059607800).

Almost surely, 2^200120111121 is an apocalyptic number.

200120111121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

200120111121 is a deficient number, since it is larger than the sum of its proper divisors (104833613679).

200120111121 is a wasteful number, since it uses less digits than its factorization.

200120111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274808.

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

Adding to 200120111121 its reverse (121111021002), we get a palindrome (321231132123).

The spelling of 200120111121 in words is "two hundred billion, one hundred twenty million, one hundred eleven thousand, one hundred twenty-one".