20012122223232 has 128 divisors (see below), whose sum is σ = 53804640960000. Its totient is φ = 6589480786944.

The previous prime is 20012122223221. The next prime is 20012122223287. The reversal of 20012122223232 is 23232222121002.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274030819 + ... + 274103837.

It is an arithmetic number, because the mean of its divisors is an integer number (420348757500).

Almost surely, 2^{20012122223232} 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 20012122223232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26902320480000).

20012122223232 is an abundant number, since it is smaller than the sum of its proper divisors (33792518736768).

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

20012122223232 is an equidigital number, since it uses as much as digits as its factorization.

20012122223232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81718 (or 81706 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20012122223232 its reverse (23232222121002), we get a palindrome (43244344344234).

The spelling of 20012122223232 in words is "twenty trillion, twelve billion, one hundred twenty-two million, two hundred twenty-three thousand, two hundred thirty-two".