21400301021 has 16 divisors (see below), whose sum is σ = 24113338368. Its totient is φ = 18815943600.

The previous prime is 21400301011. The next prime is 21400301059. The reversal of 21400301021 is 12010300412.

It is a cyclic number.

It is not a de Polignac number, because 21400301021 - 2¹⁴ = 21400284637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21400300987 and 21400301005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400301011) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 577766 + ... + 613688.

It is an arithmetic number, because the mean of its divisors is an integer number (1507083648).

Almost surely, 2^21400301021 is an apocalyptic number.

It is an amenable number.

21400301021 is a deficient number, since it is larger than the sum of its proper divisors (2713037347).

21400301021 is a wasteful number, since it uses less digits than its factorization.

21400301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37712.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21400301021 its reverse (12010300412), we get a palindrome (33410601433).

The spelling of 21400301021 in words is "twenty-one billion, four hundred million, three hundred one thousand, twenty-one".