21355335201 has 16 divisors (see below), whose sum is σ = 29482617600. Its totient is φ = 13733371008.

The previous prime is 21355335187. The next prime is 21355335223. The reversal of 21355335201 is 10253355312.

It is not a de Polignac number, because 21355335201 - 2¹³ = 21355327009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21355333201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16441 + ... + 207318.

It is an arithmetic number, because the mean of its divisors is an integer number (1842663600).

Almost surely, 2^21355335201 is an apocalyptic number.

It is an amenable number.

21355335201 is a deficient number, since it is larger than the sum of its proper divisors (8127282399).

21355335201 is a wasteful number, since it uses less digits than its factorization.

21355335201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224888.

The product of its (nonzero) digits is 13500, while the sum is 30.

The spelling of 21355335201 in words is "twenty-one billion, three hundred fifty-five million, three hundred thirty-five thousand, two hundred one".