21114203215 has 16 divisors (see below), whose sum is σ = 29000996928. Its totient is φ = 14456123136.

The previous prime is 21114203213. The next prime is 21114203221. The reversal of 21114203215 is 51230241112.

It is not a de Polignac number, because 21114203215 - 2¹ = 21114203213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114203213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439062 + ... + 484771.

It is an arithmetic number, because the mean of its divisors is an integer number (1812562308).

Almost surely, 2^21114203215 is an apocalyptic number.

21114203215 is a deficient number, since it is larger than the sum of its proper divisors (7886793713).

21114203215 is an equidigital number, since it uses as much as digits as its factorization.

21114203215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924498.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 21114203215 its reverse (51230241112), we get a palindrome (72344444327).

The spelling of 21114203215 in words is "twenty-one billion, one hundred fourteen million, two hundred three thousand, two hundred fifteen".