2021111112222 has 24 divisors (see below), whose sum is σ = 4379206477464. Its totient is φ = 673683334704.

The previous prime is 2021111112199. The next prime is 2021111112323. The reversal of 2021111112222 is 2222111111202.

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 = 2021111112195 and 2021111112204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1079493 + ... + 2282000.

It is an arithmetic number, because the mean of its divisors is an integer number (182466936561).

Almost surely, 2^{2021111112222} is an apocalyptic number.

2021111112222 is an abundant number, since it is smaller than the sum of its proper divisors (2358095365242).

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

2021111112222 is a wasteful number, since it uses less digits than its factorization.

2021111112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394904 (or 3394901 counting only the distinct ones).

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

Adding to 2021111112222 its reverse (2222111111202), we get a palindrome (4243222223424).

The spelling of 2021111112222 in words is "two trillion, twenty-one billion, one hundred eleven million, one hundred twelve thousand, two hundred twenty-two".