21021300213321 has 16 divisors (see below), whose sum is σ = 29016846207360. Its totient is φ = 13520708826240.

The previous prime is 21021300213317. The next prime is 21021300213323. The reversal of 21021300213321 is 12331200312012.

It is not a de Polignac number, because 21021300213321 - 2² = 21021300213317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21021300213323) 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, 91340085 + ... + 91569938.

It is an arithmetic number, because the mean of its divisors is an integer number (1813552887960).

Almost surely, 2^{21021300213321} is an apocalyptic number.

It is an amenable number.

21021300213321 is a deficient number, since it is larger than the sum of its proper divisors (7995545994039).

21021300213321 is a wasteful number, since it uses less digits than its factorization.

21021300213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182911376.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21021300213321 its reverse (12331200312012), we get a palindrome (33352500525333).

The spelling of 21021300213321 in words is "twenty-one trillion, twenty-one billion, three hundred million, two hundred thirteen thousand, three hundred twenty-one".