120021312312 has 144 divisors (see below), whose sum is σ = 358382901240. Its totient is φ = 36259344000.

The previous prime is 120021312311. The next prime is 120021312337. The reversal of 120021312312 is 213213120021.

120021312312 is a `hidden beast` number, since 1 + 20 + 0 + 21 + 312 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021312311) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2862862 + ... + 2904482.

Almost surely, 2^120021312312 is an apocalyptic number.

120021312312 is a gapful number since it is divisible by the number (12) 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 120021312312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179191450620).

120021312312 is an abundant number, since it is smaller than the sum of its proper divisors (238361588928).

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

120021312312 is a wasteful number, since it uses less digits than its factorization.

120021312312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41986 (or 41968 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 120021312312 its reverse (213213120021), we get a palindrome (333234432333).

The spelling of 120021312312 in words is "one hundred twenty billion, twenty-one million, three hundred twelve thousand, three hundred twelve".