10021212009 has 48 divisors (see below), whose sum is σ = 15641683200. Its totient is φ = 6163099488.

The previous prime is 10021211989. The next prime is 10021212011. The reversal of 10021212009 is 90021212001.

It is not a de Polignac number, because 10021212009 - 2⁷ = 10021211881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10021211982 and 10021212000.

It is not an unprimeable number, because it can be changed into a prime (10021212029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1074882 + ... + 1084164.

It is an arithmetic number, because the mean of its divisors is an integer number (325868400).

Almost surely, 2^10021212009 is an apocalyptic number.

10021212009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

10021212009 is a deficient number, since it is larger than the sum of its proper divisors (5620471191).

10021212009 is a wasteful number, since it uses less digits than its factorization.

10021212009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9474 (or 9471 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 10021212009 in words is "ten billion, twenty-one million, two hundred twelve thousand, nine".