21011320211130 has 48 divisors (see below), whose sum is σ = 54632201401440. Its totient is φ = 5602734738144.

The previous prime is 21011320211117. The next prime is 21011320211159. The reversal of 21011320211130 is 3111202311012.

21011320211130 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 1 + 320 + 211 + 130 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 4127800 + ... + 7685139.

It is an arithmetic number, because the mean of its divisors is an integer number (1138170862530).

Almost surely, 2^{21011320211130} is an apocalyptic number.

21011320211130 is an abundant number, since it is smaller than the sum of its proper divisors (33620881190310).

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

21011320211130 is a wasteful number, since it uses less digits than its factorization.

21011320211130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11832715 (or 11832712 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21011320211130 its reverse (3111202311012), we get a palindrome (24122522522142).

The spelling of 21011320211130 in words is "twenty-one trillion, eleven billion, three hundred twenty million, two hundred eleven thousand, one hundred thirty".