2021122011222 has 64 divisors (see below), whose sum is σ = 4550439928320. Its totient is φ = 664891596000.

The previous prime is 2021122011217. The next prime is 2021122011239. The reversal of 2021122011222 is 2221102211202.

It is a happy number.

2021122011222 is a `hidden beast` number, since 2 + 0 + 211 + 220 + 11 + 222 = 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 = 2021122011195 and 2021122011204.

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, 1100413 + ... + 2291975.

It is an arithmetic number, because the mean of its divisors is an integer number (71100623880).

Almost surely, 2^{2021122011222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021122011222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2275219964160).

2021122011222 is an abundant number, since it is smaller than the sum of its proper divisors (2529317917098).

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

2021122011222 is a wasteful number, since it uses less digits than its factorization.

2021122011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191986 (or 1191980 counting only the distinct ones).

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

Adding to 2021122011222 its reverse (2221102211202), we get a palindrome (4242224222424).

The spelling of 2021122011222 in words is "two trillion, twenty-one billion, one hundred twenty-two million, eleven thousand, two hundred twenty-two".