12211025351220 has 144 divisors (see below), whose sum is σ = 37930554501840. Its totient is φ = 3178616383488.

The previous prime is 12211025351179. The next prime is 12211025351233. The reversal of 12211025351220 is 2215352011221.

12211025351220 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 1 + 0 + 2 + 535 + 122 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 113275326096 + 12097750025124 = 336564^2 + 3478182^2 .

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 47 ways as a sum of consecutive naturals, for example, 1369305 + ... + 5128064.

It is an arithmetic number, because the mean of its divisors is an integer number (263406628485).

Almost surely, 2^{12211025351220} is an apocalyptic number.

12211025351220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211025351220 is an abundant number, since it is smaller than the sum of its proper divisors (25719529150620).

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

12211025351220 is a wasteful number, since it uses less digits than its factorization.

12211025351220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6497634 (or 6497629 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 12211025351220 its reverse (2215352011221), we get a palindrome (14426377362441).

The spelling of 12211025351220 in words is "twelve trillion, two hundred eleven billion, twenty-five million, three hundred fifty-one thousand, two hundred twenty".