21162651010009 has 8 divisors (see below), whose sum is σ = 21381263436960. Its totient is φ = 20944047578496.

The previous prime is 21162651010001. The next prime is 21162651010013. The reversal of 21162651010009 is 90001015626112.

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 21162651010009 - 2³ = 21162651010001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21162651010001) 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, 2532882 + ... + 6981460.

It is an arithmetic number, because the mean of its divisors is an integer number (2672657929620).

Almost surely, 2^{21162651010009} is an apocalyptic number.

It is an amenable number.

21162651010009 is a deficient number, since it is larger than the sum of its proper divisors (218612426951).

21162651010009 is an equidigital number, since it uses as much as digits as its factorization.

21162651010009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4497719.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 21162651010009 in words is "twenty-one trillion, one hundred sixty-two billion, six hundred fifty-one million, ten thousand, nine".