1012021212009 has 4 divisors (see below), whose sum is σ = 1349361616016. Its totient is φ = 674680808004.

The previous prime is 1012021211951. The next prime is 1012021212067. The reversal of 1012021212009 is 9002121202101.

1012021212009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1012021211951) and next prime (1012021212067).

It is not a de Polignac number, because 1012021212009 - 2¹⁵ = 1012021179241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012021212089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168670201999 + ... + 168670202004.

It is an arithmetic number, because the mean of its divisors is an integer number (337340404004).

Almost surely, 2^{1012021212009} is an apocalyptic number.

It is an amenable number.

1012021212009 is a deficient number, since it is larger than the sum of its proper divisors (337340404007).

1012021212009 is an equidigital number, since it uses as much as digits as its factorization.

1012021212009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337340404006.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 1012021212009 in words is "one trillion, twelve billion, twenty-one million, two hundred twelve thousand, nine".