100111121220220 has 48 divisors (see below), whose sum is σ = 229346160674400. Its totient is φ = 36403935672320.

The previous prime is 100111121220199. The next prime is 100111121220221. The reversal of 100111121220220 is 22022121111001.

It is a junction number, because it is equal to n+sod(n) for n = 100111121220194 and 100111121220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111121220221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134737896 + ... + 135478864.

It is an arithmetic number, because the mean of its divisors is an integer number (4778045014050).

Almost surely, 2^{100111121220220} is an apocalyptic number.

100111121220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100111121220220 is an abundant number, since it is smaller than the sum of its proper divisors (129235039454180).

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

100111121220220 is a wasteful number, since it uses less digits than its factorization.

100111121220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355118 (or 1355116 counting only the distinct ones).

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

Adding to 100111121220220 its reverse (22022121111001), we get a palindrome (122133242331221).

The spelling of 100111121220220 in words is "one hundred trillion, one hundred eleven billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty".