12621210886620 has 288 divisors, whose sum is σ = 46080993268800. Its totient is φ = 2859317895168.

The previous prime is 12621210886589. The next prime is 12621210886699. The reversal of 12621210886620 is 2668801212621.

12621210886620 is a `hidden beast` number, since 1 + 2 + 6 + 2 + 1 + 2 + 10 + 8 + 8 + 6 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 879396 + ... + 5100564.

It is an arithmetic number, because the mean of its divisors is an integer number (160003448850).

Almost surely, 2^{12621210886620} is an apocalyptic number.

12621210886620 is a gapful number since it is divisible by the number (10) 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 12621210886620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23040496634400).

12621210886620 is an abundant number, since it is smaller than the sum of its proper divisors (33459782382180).

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

12621210886620 is a wasteful number, since it uses less digits than its factorization.

12621210886620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221314 (or 4221299 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 12621210886620 in words is "twelve trillion, six hundred twenty-one billion, two hundred ten million, eight hundred eighty-six thousand, six hundred twenty".