120221311212 has 96 divisors (see below), whose sum is σ = 333287317440. Its totient is φ = 37343001600.

The previous prime is 120221311193. The next prime is 120221311261. The reversal of 120221311212 is 212113122021.

120221311212 is a `hidden beast` number, since 120 + 2 + 21 + 311 + 212 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138723 + ... + 509594.

It is an arithmetic number, because the mean of its divisors is an integer number (3471742890).

Almost surely, 2^120221311212 is an apocalyptic number.

120221311212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

120221311212 is an abundant number, since it is smaller than the sum of its proper divisors (213066006228).

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

120221311212 is a wasteful number, since it uses less digits than its factorization.

120221311212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648448 (or 648440 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 120221311212 its reverse (212113122021), we get a palindrome (332334433233).

The spelling of 120221311212 in words is "one hundred twenty billion, two hundred twenty-one million, three hundred eleven thousand, two hundred twelve".