1022112221 has 16 divisors (see below), whose sum is σ = 1140437760. Its totient is φ = 909558720.

The previous prime is 1022112209. The next prime is 1022112229. The reversal of 1022112221 is 1222112201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022112221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1022112196 and 1022112205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022112229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304076 + ... + 307418.

It is an arithmetic number, because the mean of its divisors is an integer number (71277360).

Almost surely, 2^1022112221 is an apocalyptic number.

It is an amenable number.

1022112221 is a deficient number, since it is larger than the sum of its proper divisors (118325539).

1022112221 is a wasteful number, since it uses less digits than its factorization.

1022112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4196.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1022112221 is about 31970.4898461065. The cubic root of 1022112221 is about 1007.3170702324.

Adding to 1022112221 its reverse (1222112201), we get a palindrome (2244224422).

The spelling of 1022112221 in words is "one billion, twenty-two million, one hundred twelve thousand, two hundred twenty-one".