21002246601 has 8 divisors (see below), whose sum is σ = 32003423424. Its totient is φ = 12001283760.

The previous prime is 21002246591. The next prime is 21002246627. The reversal of 21002246601 is 10664220012.

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

It is not a de Polignac number, because 21002246601 - 2⁵ = 21002246569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21002206601) 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 7 ways as a sum of consecutive naturals, for example, 500053470 + ... + 500053511.

It is an arithmetic number, because the mean of its divisors is an integer number (4000427928).

Almost surely, 2^21002246601 is an apocalyptic number.

21002246601 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21002246601 is a deficient number, since it is larger than the sum of its proper divisors (11001176823).

21002246601 is a wasteful number, since it uses less digits than its factorization.

21002246601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000106991.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21002246601 its reverse (10664220012), we get a palindrome (31666466613).

The spelling of 21002246601 in words is "twenty-one billion, two million, two hundred forty-six thousand, six hundred one".