100020121111120 has 80 divisors (see below), whose sum is σ = 265857754014720. Its totient is φ = 34280999580672.

The previous prime is 100020121111117. The next prime is 100020121111187. The reversal of 100020121111120 is 21111121020001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-5 number, since 5×100020121111120⁵ (a number of 71 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 100020121111120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28588000 + ... + 31895359.

It is an arithmetic number, because the mean of its divisors is an integer number (3323221925184).

Almost surely, 2^{100020121111120} is an apocalyptic number.

100020121111120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100020121111120 is an abundant number, since it is smaller than the sum of its proper divisors (165837632903600).

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

100020121111120 is a wasteful number, since it uses less digits than its factorization.

100020121111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60486332 (or 60486326 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 100020121111120 its reverse (21111121020001), we get a palindrome (121131242131121).

The spelling of 100020121111120 in words is "one hundred trillion, twenty billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twenty".