21021300203210 has 8 divisors (see below), whose sum is σ = 37838340365796. Its totient is φ = 8408520081280.

The previous prime is 21021300203153. The next prime is 21021300203231. The reversal of 21021300203210 is 1230200312012.

It can be written as a sum of positive squares in 2 ways, for example, as 18383933947201 + 2637366256009 = 4287649^2 + 1623997^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051065010151 + ... + 1051065010170.

Almost surely, 2^{21021300203210} is an apocalyptic number.

21021300203210 is a deficient number, since it is larger than the sum of its proper divisors (16817040162586).

21021300203210 is a wasteful number, since it uses less digits than its factorization.

21021300203210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102130020328.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21021300203210 its reverse (1230200312012), we get a palindrome (22251500515222).

The spelling of 21021300203210 in words is "twenty-one trillion, twenty-one billion, three hundred million, two hundred three thousand, two hundred ten".