21032101321 has 64 divisors (see below), whose sum is σ = 27411664896. Its totient is φ = 15664665600.

The previous prime is 21032101303. The next prime is 21032101331. The reversal of 21032101321 is 12310123012.

It is a cyclic number.

It is not a de Polignac number, because 21032101321 - 2⁷ = 21032101193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21032101295 and 21032101304.

It is not an unprimeable number, because it can be changed into a prime (21032101331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60611070 + ... + 60611416.

It is an arithmetic number, because the mean of its divisors is an integer number (428307264).

Almost surely, 2^21032101321 is an apocalyptic number.

It is an amenable number.

21032101321 is a deficient number, since it is larger than the sum of its proper divisors (6379563575).

21032101321 is a wasteful number, since it uses less digits than its factorization.

21032101321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21032101321 its reverse (12310123012), we get a palindrome (33342224333).

The spelling of 21032101321 in words is "twenty-one billion, thirty-two million, one hundred one thousand, three hundred twenty-one".