1222112112021 has 24 divisors (see below), whose sum is σ = 1783609622496. Its totient is φ = 806286146400.

The previous prime is 1222112111999. The next prime is 1222112112047. The reversal of 1222112112021 is 1202112112221.

It is not a de Polignac number, because 1222112112021 - 2⁵ = 1222112111989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222112111985 and 1222112112003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222112112721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1570726 + ... + 2216168.

It is an arithmetic number, because the mean of its divisors is an integer number (74317067604).

Almost surely, 2^{1222112112021} is an apocalyptic number.

It is an amenable number.

1222112112021 is a deficient number, since it is larger than the sum of its proper divisors (561497510475).

1222112112021 is a wasteful number, since it uses less digits than its factorization.

1222112112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647633 (or 647630 counting only the distinct ones).

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

Adding to 1222112112021 its reverse (1202112112221), we get a palindrome (2424224224242).

The spelling of 1222112112021 in words is "one trillion, two hundred twenty-two billion, one hundred twelve million, one hundred twelve thousand, twenty-one".