21210515500201 has 8 divisors (see below), whose sum is σ = 21248585395200. Its totient is φ = 21172447009872.

The previous prime is 21210515500169. The next prime is 21210515500249. The reversal of 21210515500201 is 10200551501212.

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 21210515500201 - 2⁵ = 21210515500169 is a prime.

It is a super-3 number, since 3×21210515500201³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210515500301) 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, 32655000 + ... + 33298198.

It is an arithmetic number, because the mean of its divisors is an integer number (2656073174400).

Almost surely, 2^{21210515500201} is an apocalyptic number.

It is an amenable number.

21210515500201 is a deficient number, since it is larger than the sum of its proper divisors (38069894999).

21210515500201 is an equidigital number, since it uses as much as digits as its factorization.

21210515500201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702335.

The product of its (nonzero) digits is 1000, while the sum is 25.

The spelling of 21210515500201 in words is "twenty-one trillion, two hundred ten billion, five hundred fifteen million, five hundred thousand, two hundred one".