120312212100 has 144 divisors (see below), whose sum is σ = 366979178496. Its totient is φ = 30387600000.

The previous prime is 120312212057. The next prime is 120312212179. The reversal of 120312212100 is 1212213021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 120312212100.

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, 299475 + ... + 574725.

Almost surely, 2^120312212100 is an apocalyptic number.

120312212100 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 120312212100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183489589248).

120312212100 is an abundant number, since it is smaller than the sum of its proper divisors (246666966396).

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

120312212100 is a wasteful number, since it uses less digits than its factorization.

120312212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275346 (or 275339 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 120312212100 its reverse (1212213021), we get a palindrome (121524425121).

The spelling of 120312212100 in words is "one hundred twenty billion, three hundred twelve million, two hundred twelve thousand, one hundred".