120021221100 has 288 divisors, whose sum is σ = 383661444096. Its totient is φ = 28727193600.

The previous prime is 120021221039. The next prime is 120021221123. The reversal of 120021221100 is 1122120021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 136853862 + ... + 136854738.

It is an arithmetic number, because the mean of its divisors is an integer number (1332157792).

Almost surely, 2^120021221100 is an apocalyptic number.

120021221100 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 120021221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191830722048).

120021221100 is an abundant number, since it is smaller than the sum of its proper divisors (263640222996).

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

120021221100 is a wasteful number, since it uses less digits than its factorization.

120021221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1378 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 120021221100 its reverse (1122120021), we get a palindrome (121143341121).

The spelling of 120021221100 in words is "one hundred twenty billion, twenty-one million, two hundred twenty-one thousand, one hundred".