21100230130 has 64 divisors (see below), whose sum is σ = 46517690880. Its totient is φ = 6732785664.

The previous prime is 21100230127. The next prime is 21100230131. The reversal of 21100230130 is 3103200112.

It is a self number, because there is not a number n which added to its sum of digits gives 21100230130.

It is not an unprimeable number, because it can be changed into a prime (21100230131) 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, 117535 + ... + 236674.

It is an arithmetic number, because the mean of its divisors is an integer number (726838920).

Almost surely, 2^21100230130 is an apocalyptic number.

21100230130 is an abundant number, since it is smaller than the sum of its proper divisors (25417460750).

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

21100230130 is a wasteful number, since it uses less digits than its factorization.

21100230130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354283.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21100230130 its reverse (3103200112), we get a palindrome (24203430242).

The spelling of 21100230130 in words is "twenty-one billion, one hundred million, two hundred thirty thousand, one hundred thirty".