21014512238705 has 8 divisors (see below), whose sum is σ = 25223302504512. Its totient is φ = 16807684578928.

The previous prime is 21014512238677. The next prime is 21014512238743. The reversal of 21014512238705 is 50783221541012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21014512238705 - 2⁶ = 21014512238641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490627949 + ... + 490670778.

It is an arithmetic number, because the mean of its divisors is an integer number (3152912813064).

Almost surely, 2^{21014512238705} is an apocalyptic number.

It is an amenable number.

21014512238705 is a deficient number, since it is larger than the sum of its proper divisors (4208790265807).

21014512238705 is an equidigital number, since it uses as much as digits as its factorization.

21014512238705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981303015.

The product of its (nonzero) digits is 134400, while the sum is 41.

Adding to 21014512238705 its reverse (50783221541012), we get a palindrome (71797733779717).

The spelling of 21014512238705 in words is "twenty-one trillion, fourteen billion, five hundred twelve million, two hundred thirty-eight thousand, seven hundred five".