10211212009 has 8 divisors (see below), whose sum is σ = 10855068480. Its totient is φ = 9577998000.

The previous prime is 10211212001. The next prime is 10211212091. The reversal of 10211212009 is 90021211201.

It is a happy number.

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 10211212009 - 2³ = 10211212001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10211212001) 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, 2658637 + ... + 2662474.

It is an arithmetic number, because the mean of its divisors is an integer number (1356883560).

Almost surely, 2^10211212009 is an apocalyptic number.

10211212009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

10211212009 is a deficient number, since it is larger than the sum of its proper divisors (643856471).

10211212009 is a wasteful number, since it uses less digits than its factorization.

10211212009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321231.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 10211212009 in words is "ten billion, two hundred eleven million, two hundred twelve thousand, nine".