21011313230220 has 48 divisors (see below), whose sum is σ = 58832445934080. Its totient is φ = 5602943633856.

The previous prime is 21011313230191. The next prime is 21011313230231. The reversal of 21011313230220 is 2203231311012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2420899 + ... + 6919781.

It is an arithmetic number, because the mean of its divisors is an integer number (1225675956960).

Almost surely, 2^{21011313230220} is an apocalyptic number.

21011313230220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011313230220 is an abundant number, since it is smaller than the sum of its proper divisors (37821132703860).

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

21011313230220 is a wasteful number, since it uses less digits than its factorization.

21011313230220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4576734 (or 4576732 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21011313230220 its reverse (2203231311012), we get a palindrome (23214544541232).

The spelling of 21011313230220 in words is "twenty-one trillion, eleven billion, three hundred thirteen million, two hundred thirty thousand, two hundred twenty".