20211222112002 has 80 divisors (see below), whose sum is σ = 46147628613240. Its totient is φ = 6609239290368.

The previous prime is 20211222111973. The next prime is 20211222112033. The reversal of 20211222112002 is 20021122211202.

It is a happy number.

20211222112002 is a `hidden beast` number, since 20 + 211 + 22 + 211 + 200 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15322926631401 + 4888295480601 = 3914451^2 + 2210949^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 81726874 + ... + 81973802.

Almost surely, 2^{20211222112002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20211222112002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23073814306620).

20211222112002 is an abundant number, since it is smaller than the sum of its proper divisors (25936406501238).

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

20211222112002 is a wasteful number, since it uses less digits than its factorization.

20211222112002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256529 (or 256520 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20211222112002 its reverse (20021122211202), we get a palindrome (40232344323204).

It can be divided in two parts, 2021122211200 and 2, that added together give a palindrome (2021122211202).

The spelling of 20211222112002 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twelve thousand, two".