102111221200 has 120 divisors (see below), whose sum is σ = 258603101120. Its totient is φ = 38639462400.

The previous prime is 102111221077. The next prime is 102111221221. The reversal of 102111221200 is 2122111201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5515960 + ... + 5534440.

Almost surely, 2^102111221200 is an apocalyptic number.

102111221200 is a gapful number since it is divisible by the number (10) 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 102111221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129301550560).

102111221200 is an abundant number, since it is smaller than the sum of its proper divisors (156491879920).

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

102111221200 is a wasteful number, since it uses less digits than its factorization.

102111221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19245 (or 19234 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102111221200 its reverse (2122111201), we get a palindrome (104233332401).

The spelling of 102111221200 in words is "one hundred two billion, one hundred eleven million, two hundred twenty-one thousand, two hundred".