21023330010321 has 24 divisors (see below), whose sum is σ = 29033730797344. Its totient is φ = 13530998194560.

The previous prime is 21023330010311. The next prime is 21023330010337. The reversal of 21023330010321 is 12301003332012.

It is not a de Polignac number, because 21023330010321 - 2⁹ = 21023330009809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21023330010311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27095445 + ... + 27860541.

Almost surely, 2^{21023330010321} is an apocalyptic number.

It is an amenable number.

21023330010321 is a deficient number, since it is larger than the sum of its proper divisors (8010400787023).

21023330010321 is a wasteful number, since it uses less digits than its factorization.

21023330010321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776049 (or 776020 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21023330010321 its reverse (12301003332012), we get a palindrome (33324333342333).

The spelling of 21023330010321 in words is "twenty-one trillion, twenty-three billion, three hundred thirty million, ten thousand, three hundred twenty-one".