1012221112109 has 32 divisors (see below), whose sum is σ = 1090904263680. Its totient is φ = 937536768000.

The previous prime is 1012221112081. The next prime is 1012221112121. The reversal of 1012221112109 is 9012111222101.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012221112109 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 (1012221112139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13020647 + ... + 13098155.

It is an arithmetic number, because the mean of its divisors is an integer number (34090758240).

Almost surely, 2^{1012221112109} is an apocalyptic number.

It is an amenable number.

1012221112109 is a deficient number, since it is larger than the sum of its proper divisors (78683151571).

1012221112109 is a wasteful number, since it uses less digits than its factorization.

1012221112109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77781.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 1012221112109 in words is "one trillion, twelve billion, two hundred twenty-one million, one hundred twelve thousand, one hundred nine".