20011331021022 has 128 divisors (see below), whose sum is σ = 49513930905600. Its totient is φ = 5939670038400.

The previous prime is 20011331020951. The next prime is 20011331021029. The reversal of 20011331021022 is 22012013311002.

20011331021022 is a `hidden beast` number, since 200 + 113 + 310 + 21 + 0 + 22 = 666.

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 = 20011331020986 and 20011331021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011331021029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7504528 + ... + 9815324.

It is an arithmetic number, because the mean of its divisors is an integer number (386827585200).

Almost surely, 2^{20011331021022} is an apocalyptic number.

20011331021022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20011331021022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24756965452800).

20011331021022 is an abundant number, since it is smaller than the sum of its proper divisors (29502599884578).

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

20011331021022 is a wasteful number, since it uses less digits than its factorization.

20011331021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311119 (or 2311113 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20011331021022 its reverse (22012013311002), we get a palindrome (42023344332024).

The spelling of 20011331021022 in words is "twenty trillion, eleven billion, three hundred thirty-one million, twenty-one thousand, twenty-two".