21315035211 has 32 divisors (see below), whose sum is σ = 29561241600. Its totient is φ = 13646775840.

The previous prime is 21315035191. The next prime is 21315035219. The reversal of 21315035211 is 11253051312.

It is not a de Polignac number, because 21315035211 - 2⁵ = 21315035179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21315035219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10769620 + ... + 10771598.

It is an arithmetic number, because the mean of its divisors is an integer number (923788800).

Almost surely, 2^21315035211 is an apocalyptic number.

21315035211 is a deficient number, since it is larger than the sum of its proper divisors (8246206389).

21315035211 is a wasteful number, since it uses less digits than its factorization.

21315035211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 21315035211 its reverse (11253051312), we get a palindrome (32568086523).

The spelling of 21315035211 in words is "twenty-one billion, three hundred fifteen million, thirty-five thousand, two hundred eleven".