221031004106 has 16 divisors (see below), whose sum is σ = 363309020928. Its totient is φ = 100018104000.

The previous prime is 221031004097. The next prime is 221031004109. The reversal of 221031004106 is 601400130122.

It is a super-2 number, since 2×221031004106² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221031004109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22521695 + ... + 22531506.

It is an arithmetic number, because the mean of its divisors is an integer number (22706813808).

Almost surely, 2^221031004106 is an apocalyptic number.

221031004106 is a deficient number, since it is larger than the sum of its proper divisors (142278016822).

221031004106 is a wasteful number, since it uses less digits than its factorization.

221031004106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45053437.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 221031004106 its reverse (601400130122), we get a palindrome (822431134228).

The spelling of 221031004106 in words is "two hundred twenty-one billion, thirty-one million, four thousand, one hundred six".