103212311220 has 72 divisors (see below), whose sum is σ = 313157740896. Its totient is φ = 27516215232.

The previous prime is 103212311149. The next prime is 103212311243. The reversal of 103212311220 is 22113212301.

103212311220 is a `hidden beast` number, since 10 + 321 + 2 + 311 + 2 + 20 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 103212311193 and 103212311202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 648919 + ... + 792161.

It is an arithmetic number, because the mean of its divisors is an integer number (4349413068).

Almost surely, 2^103212311220 is an apocalyptic number.

103212311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103212311220 is an abundant number, since it is smaller than the sum of its proper divisors (209945429676).

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

103212311220 is a wasteful number, since it uses less digits than its factorization.

103212311220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147261 (or 147256 counting only the distinct ones).

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

Adding to 103212311220 its reverse (22113212301), we get a palindrome (125325523521).

The spelling of 103212311220 in words is "one hundred three billion, two hundred twelve million, three hundred eleven thousand, two hundred twenty".