221200120101121 has 24 divisors (see below), whose sum is σ = 259953257283840. Its totient is φ = 187657017660000.

The previous prime is 221200120101047. The next prime is 221200120101127. The reversal of 221200120101121 is 121101021002122.

It is not a de Polignac number, because 221200120101121 - 2¹³ = 221200120092929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221200120101095 and 221200120101104.

It is not an unprimeable number, because it can be changed into a prime (221200120101127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6270960 + ... + 21948238.

It is an arithmetic number, because the mean of its divisors is an integer number (10831385720160).

Almost surely, 2^{221200120101121} is an apocalyptic number.

It is an amenable number.

221200120101121 is a deficient number, since it is larger than the sum of its proper divisors (38753137182719).

221200120101121 is a wasteful number, since it uses less digits than its factorization.

221200120101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15680245 (or 15680238 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221200120101121 its reverse (121101021002122), we get a palindrome (342301141103243).

The spelling of 221200120101121 in words is "two hundred twenty-one trillion, two hundred billion, one hundred twenty million, one hundred one thousand, one hundred twenty-one".