2229971129856 has 200 divisors, whose sum is σ = 6870586307904. Its totient is φ = 719345111040.

The previous prime is 2229971129819. The next prime is 2229971129857. The reversal of 2229971129856 is 6589211799222.

2229971129856 is a `hidden beast` number, since 2 + 2 + 299 + 7 + 1 + 1 + 298 + 56 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2229971129793 and 2229971129802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2229971129857) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 418366 + ... + 2152898.

Almost surely, 2^{2229971129856} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2229971129856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3435293153952).

2229971129856 is an abundant number, since it is smaller than the sum of its proper divisors (4640615178048).

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

2229971129856 is an equidigital number, since it uses as much as digits as its factorization.

2229971129856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734594 (or 1734569 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 63.

The spelling of 2229971129856 in words is "two trillion, two hundred twenty-nine billion, nine hundred seventy-one million, one hundred twenty-nine thousand, eight hundred fifty-six".