1001212009 has 8 divisors (see below), whose sum is σ = 1159917440. Its totient is φ = 846425376.

The previous prime is 1001211989. The next prime is 1001212013. The reversal of 1001212009 is 9002121001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001212009 - 2⁷ = 1001211881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001211983 and 1001212001.

It is not an unprimeable number, because it can be changed into a prime (1001212019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 979149 + ... + 980170.

It is an arithmetic number, because the mean of its divisors is an integer number (144989680).

Almost surely, 2^1001212009 is an apocalyptic number.

It is an amenable number.

1001212009 is a deficient number, since it is larger than the sum of its proper divisors (158705431).

1001212009 is an equidigital number, since it uses as much as digits as its factorization.

1001212009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959399.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1001212009 is about 31641.9343435258. The cubic root of 1001212009 is about 1000.4038398914.

The spelling of 1001212009 in words is "one billion, one million, two hundred twelve thousand, nine".