221201121101 has 16 divisors (see below), whose sum is σ = 234980922240. Its totient is φ = 207507363840.

The previous prime is 221201121091. The next prime is 221201121103. The reversal of 221201121101 is 101121102122.

It is a de Polignac number, because none of the positive numbers 2^k-221201121101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201121103) 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, 10923656 + ... + 10943886.

It is an arithmetic number, because the mean of its divisors is an integer number (14686307640).

Almost surely, 2^221201121101 is an apocalyptic number.

It is an amenable number.

221201121101 is a deficient number, since it is larger than the sum of its proper divisors (13779801139).

221201121101 is a wasteful number, since it uses less digits than its factorization.

221201121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22324.

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

Adding to 221201121101 its reverse (101121102122), we get a palindrome (322322223223).

The spelling of 221201121101 in words is "two hundred twenty-one billion, two hundred one million, one hundred twenty-one thousand, one hundred one".