21014202321 has 12 divisors (see below), whose sum is σ = 34690111872. Its totient is φ = 12008115576.

The previous prime is 21014202269. The next prime is 21014202329. The reversal of 21014202321 is 12320241012.

It is a happy number.

21014202321 is a `hidden beast` number, since 2 + 10 + 1 + 420 + 232 + 1 = 666.

It is not a de Polignac number, because 21014202321 - 2¹⁷ = 21014071249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21014202294 and 21014202303.

It is not an unprimeable number, because it can be changed into a prime (21014202329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166779321 + ... + 166779446.

It is an arithmetic number, because the mean of its divisors is an integer number (2890842656).

Almost surely, 2^21014202321 is an apocalyptic number.

21014202321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21014202321 is a deficient number, since it is larger than the sum of its proper divisors (13675909551).

21014202321 is a wasteful number, since it uses less digits than its factorization.

21014202321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333558780 (or 333558777 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21014202321 its reverse (12320241012), we get a palindrome (33334443333).

The spelling of 21014202321 in words is "twenty-one billion, fourteen million, two hundred two thousand, three hundred twenty-one".