21014230331 has 4 divisors (see below), whose sum is σ = 21016452552. Its totient is φ = 21012008112.

The previous prime is 21014230309. The next prime is 21014230379. The reversal of 21014230331 is 13303241012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21014230331 - 2⁶ = 21014230267 is a prime.

It is a super-2 number, since 2×21014230331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21014230381) 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 3 ways as a sum of consecutive naturals, for example, 1096865 + ... + 1115858.

It is an arithmetic number, because the mean of its divisors is an integer number (5254113138).

Almost surely, 2^21014230331 is an apocalyptic number.

21014230331 is a deficient number, since it is larger than the sum of its proper divisors (2222221).

21014230331 is an equidigital number, since it uses as much as digits as its factorization.

21014230331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222220.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21014230331 its reverse (13303241012), we get a palindrome (34317471343).

The spelling of 21014230331 in words is "twenty-one billion, fourteen million, two hundred thirty thousand, three hundred thirty-one".