21100220130 has 32 divisors (see below), whose sum is σ = 55244213568. Its totient is φ = 5115204800.

The previous prime is 21100220111. The next prime is 21100220131. The reversal of 21100220130 is 3102200112.

It is not an unprimeable number, because it can be changed into a prime (21100220131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31969701 + ... + 31970360.

It is an arithmetic number, because the mean of its divisors is an integer number (1726381674).

Almost surely, 2^21100220130 is an apocalyptic number.

21100220130 is an abundant number, since it is smaller than the sum of its proper divisors (34143993438).

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

21100220130 is a wasteful number, since it uses less digits than its factorization.

21100220130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63940082.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21100220130 its reverse (3102200112), we get a palindrome (24202420242).

It can be divided in two parts, 211002 and 20130, that added together give a palindrome (231132).

The spelling of 21100220130 in words is "twenty-one billion, one hundred million, two hundred twenty thousand, one hundred thirty".