22012000212120 has 128 divisors (see below), whose sum is σ = 66794748638400. Its totient is φ = 5802455588864.

The previous prime is 22012000212089. The next prime is 22012000212143. The reversal of 22012000212120 is 2121200021022.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22012000212120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42602044 + ... + 43115636.

Almost surely, 2^{22012000212120} is an apocalyptic number.

22012000212120 is a gapful number since it is divisible by the number (20) 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 22012000212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33397374319200).

22012000212120 is an abundant number, since it is smaller than the sum of its proper divisors (44782748426280).

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

22012000212120 is a wasteful number, since it uses less digits than its factorization.

22012000212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517709 (or 517705 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22012000212120 its reverse (2121200021022), we get a palindrome (24133200233142).

The spelling of 22012000212120 in words is "twenty-two trillion, twelve billion, two hundred twelve thousand, one hundred twenty".