21421040201 has 8 divisors (see below), whose sum is σ = 23380723008. Its totient is φ = 19463410000.

The previous prime is 21421040191. The next prime is 21421040209. The reversal of 21421040201 is 10204012412.

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 21421040201 - 2²² = 21416845897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21421040201.

It is not an unprimeable number, because it can be changed into a prime (21421040209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491285 + ... + 533106.

It is an arithmetic number, because the mean of its divisors is an integer number (2922590376).

Almost surely, 2^21421040201 is an apocalyptic number.

It is an amenable number.

21421040201 is a deficient number, since it is larger than the sum of its proper divisors (1959682807).

21421040201 is a wasteful number, since it uses less digits than its factorization.

21421040201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026303.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21421040201 its reverse (10204012412), we get a palindrome (31625052613).

The spelling of 21421040201 in words is "twenty-one billion, four hundred twenty-one million, forty thousand, two hundred one".