221442122100 has 72 divisors (see below), whose sum is σ = 650268706528. Its totient is φ = 58169865600.

The previous prime is 221442122081. The next prime is 221442122107. The reversal of 221442122100 is 1221244122.

It is a super-2 number, since 2×221442122100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221442122107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5488411 + ... + 5528610.

Almost surely, 2^221442122100 is an apocalyptic number.

221442122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221442122100 is an abundant number, since it is smaller than the sum of its proper divisors (428826584428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221442122100 is a wasteful number, since it uses less digits than its factorization.

221442122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11017105 (or 11017098 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221442122100 its reverse (1221244122), we get a palindrome (222663366222).

The spelling of 221442122100 in words is "two hundred twenty-one billion, four hundred forty-two million, one hundred twenty-two thousand, one hundred".