1022212109 has 4 divisors (see below), whose sum is σ = 1022283516. Its totient is φ = 1022140704.

The previous prime is 1022212049. The next prime is 1022212117. The reversal of 1022212109 is 9012122201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 500774884 + 521437225 = 22378^2 + 22835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022212109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022211109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5984 + ... + 45609.

It is an arithmetic number, because the mean of its divisors is an integer number (255570879).

Almost surely, 2^1022212109 is an apocalyptic number.

It is an amenable number.

1022212109 is a deficient number, since it is larger than the sum of its proper divisors (71407).

1022212109 is an equidigital number, since it uses as much as digits as its factorization.

1022212109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71406.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1022212109 is about 31972.0519985815. The cubic root of 1022212109 is about 1007.3498832014.

The spelling of 1022212109 in words is "one billion, twenty-two million, two hundred twelve thousand, one hundred nine".