21210200000987 has 8 divisors (see below), whose sum is σ = 21313383062400. Its totient is φ = 21107108784384.

The previous prime is 21210200000959. The next prime is 21210200001071. The reversal of 21210200000987 is 78900000201212.

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 21210200000987 - 2⁶ = 21210200000923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210200000287) 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, 22498187 + ... + 23421972.

It is an arithmetic number, because the mean of its divisors is an integer number (2664172882800).

Almost surely, 2^{21210200000987} is an apocalyptic number.

21210200000987 is a deficient number, since it is larger than the sum of its proper divisors (103183061413).

21210200000987 is a wasteful number, since it uses less digits than its factorization.

21210200000987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45922405.

The product of its (nonzero) digits is 4032, while the sum is 32.

The spelling of 21210200000987 in words is "twenty-one trillion, two hundred ten billion, two hundred million, nine hundred eighty-seven", and thus it is an aban number.