103221312012 has 144 divisors (see below), whose sum is σ = 335248929120. Its totient is φ = 27223185024.

The previous prime is 103221311987. The next prime is 103221312049. The reversal of 103221312012 is 210213122301.

103221312012 is a `hidden beast` number, since 10 + 322 + 131 + 201 + 2 = 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 681403 + ... + 818994.

Almost surely, 2^103221312012 is an apocalyptic number.

103221312012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

103221312012 is an abundant number, since it is smaller than the sum of its proper divisors (232027617108).

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

103221312012 is a wasteful number, since it uses less digits than its factorization.

103221312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500437 (or 1500422 counting only the distinct ones).

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

Adding to 103221312012 its reverse (210213122301), we get a palindrome (313434434313).

The spelling of 103221312012 in words is "one hundred three billion, two hundred twenty-one million, three hundred twelve thousand, twelve".