21335314120 has 16 divisors (see below), whose sum is σ = 48004456860. Its totient is φ = 8534125632.

The previous prime is 21335314103. The next prime is 21335314129. The reversal of 21335314120 is 2141353312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19353817924 + 1981496196 = 139118^2 + 44514^2 .

It is not an unprimeable number, because it can be changed into a prime (21335314129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266691387 + ... + 266691466.

Almost surely, 2^21335314120 is an apocalyptic number.

21335314120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21335314120 is an abundant number, since it is smaller than the sum of its proper divisors (26669142740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21335314120 is a wasteful number, since it uses less digits than its factorization.

21335314120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533382864 (or 533382860 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 21335314120 its reverse (2141353312), we get a palindrome (23476667432).

The spelling of 21335314120 in words is "twenty-one billion, three hundred thirty-five million, three hundred fourteen thousand, one hundred twenty".