20213311122 has 72 divisors (see below), whose sum is σ = 47020632204. Its totient is φ = 6270530112.

The previous prime is 20213311091. The next prime is 20213311163. The reversal of 20213311122 is 22111331202.

20213311122 is a `hidden beast` number, since 20 + 213 + 311 + 122 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15442784361 + 4770526761 = 124269^2 + 69069^2 .

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 = 20213311095 and 20213311104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 323628 + ... + 381000.

Almost surely, 2^20213311122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20213311122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23510316102).

20213311122 is an abundant number, since it is smaller than the sum of its proper divisors (26807321082).

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

20213311122 is a wasteful number, since it uses less digits than its factorization.

20213311122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57464 (or 57438 counting only the distinct ones).

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

Adding to 20213311122 its reverse (22111331202), we get a palindrome (42324642324).

The spelling of 20213311122 in words is "twenty billion, two hundred thirteen million, three hundred eleven thousand, one hundred twenty-two".