1210112021009 has 4 divisors (see below), whose sum is σ = 1223708785380. Its totient is φ = 1196515256640.

The previous prime is 1210112020993. The next prime is 1210112021051. The reversal of 1210112021009 is 9001202110121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 210591963409 + 999520057600 = 458903^2 + 999760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210112021009 - 2⁴ = 1210112020993 is a prime.

It is a super-2 number, since 2×1210112021009² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210112051009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6798382052 + ... + 6798382229.

It is an arithmetic number, because the mean of its divisors is an integer number (305927196345).

Almost surely, 2^{1210112021009} is an apocalyptic number.

It is an amenable number.

1210112021009 is a deficient number, since it is larger than the sum of its proper divisors (13596764371).

1210112021009 is an equidigital number, since it uses as much as digits as its factorization.

1210112021009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13596764370.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1210112021009 in words is "one trillion, two hundred ten billion, one hundred twelve million, twenty-one thousand, nine".