221411640712106 has 32 divisors (see below), whose sum is σ = 365290960446720. Its totient is φ = 100011321982656.

The previous prime is 221411640712069. The next prime is 221411640712109. The reversal of 221411640712106 is 601217046114122.

It is a super-2 number, since 2×221411640712106² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221411640712106.

It is not an unprimeable number, because it can be changed into a prime (221411640712109) 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, 23802980 + ... + 31771136.

It is an arithmetic number, because the mean of its divisors is an integer number (11415342513960).

Almost surely, 2^{221411640712106} is an apocalyptic number.

221411640712106 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

221411640712106 is a deficient number, since it is larger than the sum of its proper divisors (143879319734614).

221411640712106 is a wasteful number, since it uses less digits than its factorization.

221411640712106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7990958.

The product of its (nonzero) digits is 32256, while the sum is 38.

Adding to 221411640712106 its reverse (601217046114122), we get a palindrome (822628686826228).

The spelling of 221411640712106 in words is "two hundred twenty-one trillion, four hundred eleven billion, six hundred forty million, seven hundred twelve thousand, one hundred six".