221220001101 has 16 divisors (see below), whose sum is σ = 323824074048. Its totient is φ = 133218758400.

The previous prime is 221220001027. The next prime is 221220001109. The reversal of 221220001101 is 101100022122.

It is not a de Polignac number, because 221220001101 - 2¹³ = 221219992909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220001109) 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, 21343980 + ... + 21354341.

It is an arithmetic number, because the mean of its divisors is an integer number (20239004628).

Almost surely, 2^221220001101 is an apocalyptic number.

It is an amenable number.

221220001101 is a deficient number, since it is larger than the sum of its proper divisors (102604072947).

221220001101 is a wasteful number, since it uses less digits than its factorization.

221220001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42698492.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221220001101 its reverse (101100022122), we get a palindrome (322320023223).

The spelling of 221220001101 in words is "two hundred twenty-one billion, two hundred twenty million, one thousand, one hundred one".