118221012 has 192 divisors, whose sum is σ = 394383360. Its totient is φ = 29766528.

The previous prime is 118221001. The next prime is 118221013. The reversal of 118221012 is 210122811.

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 (118221013) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 225783 + ... + 226305.

It is an arithmetic number, because the mean of its divisors is an integer number (2054080).

Almost surely, 2^118221012 is an apocalyptic number.

118221012 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 118221012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197191680).

118221012 is an abundant number, since it is smaller than the sum of its proper divisors (276162348).

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

118221012 is a wasteful number, since it uses less digits than its factorization.

118221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 118221012 is about 10872.9486341103. The cubic root of 118221012 is about 490.7928466626.

Adding to 118221012 its reverse (210122811), we get a palindrome (328343823).

The spelling of 118221012 in words is "one hundred eighteen million, two hundred twenty-one thousand, twelve".