21356461201 has 8 divisors (see below), whose sum is σ = 21398636000. Its totient is φ = 21314327040.

The previous prime is 21356461171. The next prime is 21356461207. The reversal of 21356461201 is 10216465312.

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 21356461201 - 2⁹ = 21356460689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21356461207) 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, 1174225 + ... + 1192273.

It is an arithmetic number, because the mean of its divisors is an integer number (2674829500).

Almost surely, 2^21356461201 is an apocalyptic number.

It is an amenable number.

21356461201 is a deficient number, since it is larger than the sum of its proper divisors (42174799).

21356461201 is a wasteful number, since it uses less digits than its factorization.

21356461201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20319.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 21356461201 in words is "twenty-one billion, three hundred fifty-six million, four hundred sixty-one thousand, two hundred one".