221112010100 has 18 divisors (see below), whose sum is σ = 479813062134. Its totient is φ = 88444804000.

The previous prime is 221112010051. The next prime is 221112010109. The reversal of 221112010100 is 1010211122.

It can be written as a sum of positive squares in 3 ways, for example, as 4101377764 + 217010632336 = 64042^2 + 465844^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112010109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1105559951 + ... + 1105560150.

Almost surely, 2^221112010100 is an apocalyptic number.

221112010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112010100 is an abundant number, since it is smaller than the sum of its proper divisors (258701052034).

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

221112010100 is a wasteful number, since it uses less digits than its factorization.

221112010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211120115 (or 2211120108 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221112010100 its reverse (1010211122), we get a palindrome (222122221222).

The spelling of 221112010100 in words is "two hundred twenty-one billion, one hundred twelve million, ten thousand, one hundred".