221122212200 has 48 divisors (see below), whose sum is σ = 521151768780. Its totient is φ = 87237250560.

The previous prime is 221122212169. The next prime is 221122212203. The reversal of 221122212200 is 2212221122.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 166589687716 + 54532524484 = 408154^2 + 233522^2 .

It is a super-3 number, since 3×221122212200³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (221122212203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7558079 + ... + 7587278.

Almost surely, 2^221122212200 is an apocalyptic number.

221122212200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221122212200 is an abundant number, since it is smaller than the sum of its proper divisors (300029556580).

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

221122212200 is a wasteful number, since it uses less digits than its factorization.

221122212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15145446 (or 15145437 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221122212200 its reverse (2212221122), we get a palindrome (223334433322).

The spelling of 221122212200 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twelve thousand, two hundred".