21301303120 has 40 divisors (see below), whose sum is σ = 49538514600. Its totient is φ = 8518287360.

The previous prime is 21301303109. The next prime is 21301303147. The reversal of 21301303120 is 2130310312.

It can be written as a sum of positive squares in 4 ways, for example, as 5289943824 + 16011359296 = 72732^2 + 126536^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×21301303120² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 21301303094 and 21301303103.

It is a congruent 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, 291040 + ... + 356800.

It is an arithmetic number, because the mean of its divisors is an integer number (1238462865).

Almost surely, 2^21301303120 is an apocalyptic number.

21301303120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21301303120 is an abundant number, since it is smaller than the sum of its proper divisors (28237211480).

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

21301303120 is a wasteful number, since it uses less digits than its factorization.

21301303120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69823 (or 69817 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21301303120 its reverse (2130310312), we get a palindrome (23431613432).

The spelling of 21301303120 in words is "twenty-one billion, three hundred one million, three hundred three thousand, one hundred twenty".