20101222211022 has 96 divisors (see below), whose sum is σ = 46139672517120. Its totient is φ = 6306972154560.

The previous prime is 20101222210991. The next prime is 20101222211027. The reversal of 20101222211022 is 22011222210102.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20101222210986 and 20101222211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101222211027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131914308 + ... + 132066600.

It is an arithmetic number, because the mean of its divisors is an integer number (480621588720).

Almost surely, 2^{20101222211022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20101222211022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23069836258560).

20101222211022 is an abundant number, since it is smaller than the sum of its proper divisors (26038450306098).

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

20101222211022 is a wasteful number, since it uses less digits than its factorization.

20101222211022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154798 (or 154795 counting only the distinct ones).

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

Adding to 20101222211022 its reverse (22011222210102), we get a palindrome (42112444421124).

The spelling of 20101222211022 in words is "twenty trillion, one hundred one billion, two hundred twenty-two million, two hundred eleven thousand, twenty-two".