221201101121 has 32 divisors (see below), whose sum is σ = 306577883136. Its totient is φ = 153973224000.

The previous prime is 221201101097. The next prime is 221201101139. The reversal of 221201101121 is 121101102122.

It is a cyclic number.

It is not a de Polignac number, because 221201101121 - 2¹⁴ = 221201084737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221201101096 and 221201101105.

It is not an unprimeable number, because it can be changed into a prime (221201101141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3533165 + ... + 3595226.

It is an arithmetic number, because the mean of its divisors is an integer number (9580558848).

Almost surely, 2^221201101121 is an apocalyptic number.

It is an amenable number.

221201101121 is a deficient number, since it is larger than the sum of its proper divisors (85376782015).

221201101121 is a wasteful number, since it uses less digits than its factorization.

221201101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7128453.

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

Adding to 221201101121 its reverse (121101102122), we get a palindrome (342302203243).

The spelling of 221201101121 in words is "two hundred twenty-one billion, two hundred one million, one hundred one thousand, one hundred twenty-one".