20211121101222 has 64 divisors (see below), whose sum is σ = 45555546700800. Its totient is φ = 6640787724480.

The previous prime is 20211121101211. The next prime is 20211121101239. The reversal of 20211121101222 is 22210112111202.

20211121101222 is a `hidden beast` number, since 20 + 211 + 1 + 211 + 0 + 1 + 222 = 666.

It is a super-2 number, since 2×20211121101222² (a number of 27 digits) contains 22 as substring.

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 = 20211121101195 and 20211121101204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18205303 + ... + 19283549.

It is an arithmetic number, because the mean of its divisors is an integer number (711805417200).

Almost surely, 2^{20211121101222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20211121101222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22777773350400).

20211121101222 is an abundant number, since it is smaller than the sum of its proper divisors (25344425599578).

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

20211121101222 is a wasteful number, since it uses less digits than its factorization.

20211121101222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083218 (or 1083212 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20211121101222 its reverse (22210112111202), we get a palindrome (42421233212424).

The spelling of 20211121101222 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-one million, one hundred one thousand, two hundred twenty-two".