221112110022100 has 216 divisors, whose sum is σ = 534586017305088. Its totient is φ = 79314444000000.

The previous prime is 221112110022079. The next prime is 221112110022113. The reversal of 221112110022100 is 1220011211122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 330855285 + ... + 331522915.

Almost surely, 2^{221112110022100} is an apocalyptic number.

221112110022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221112110022100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267293008652544).

221112110022100 is an abundant number, since it is smaller than the sum of its proper divisors (313473907282988).

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

221112110022100 is a wasteful number, since it uses less digits than its factorization.

221112110022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668039 (or 668021 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221112110022100 its reverse (1220011211122), we get a palindrome (222332121233222).

It can be divided in two parts, 2211121 and 10022100, that added together give a palindrome (12233221).

The spelling of 221112110022100 in words is "two hundred twenty-one trillion, one hundred twelve billion, one hundred ten million, twenty-two thousand, one hundred".