120021100100 has 144 divisors (see below), whose sum is σ = 296837001216. Its totient is φ = 41695632000.

The previous prime is 120021100079. The next prime is 120021100153. The reversal of 120021100100 is 1001120021.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25069907 + ... + 25074693.

It is an arithmetic number, because the mean of its divisors is an integer number (2061368064).

Almost surely, 2^120021100100 is an apocalyptic number.

120021100100 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 120021100100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148418500608).

120021100100 is an abundant number, since it is smaller than the sum of its proper divisors (176815901116).

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

120021100100 is a wasteful number, since it uses less digits than its factorization.

120021100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5826 (or 5819 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 120021100100 its reverse (1001120021), we get a palindrome (121022220121).

The spelling of 120021100100 in words is "one hundred twenty billion, twenty-one million, one hundred thousand, one hundred".