100002001120120 has 128 divisors (see below), whose sum is σ = 247645295619840. Its totient is φ = 36040571607040.

The previous prime is 100002001120111. The next prime is 100002001120121. The reversal of 100002001120120 is 21021100200001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 100002001120097 and 100002001120106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100002001120121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1138892139 + ... + 1138979941.

It is an arithmetic number, because the mean of its divisors is an integer number (1934728872030).

Almost surely, 2^{100002001120120} is an apocalyptic number.

100002001120120 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 100002001120120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123822647809920).

100002001120120 is an abundant number, since it is smaller than the sum of its proper divisors (147643294499720).

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

100002001120120 is a wasteful number, since it uses less digits than its factorization.

100002001120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110845 (or 110841 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 100002001120120 its reverse (21021100200001), we get a palindrome (121023101320121).

The spelling of 100002001120120 in words is "one hundred trillion, two billion, one million, one hundred twenty thousand, one hundred twenty".