21331121130 has 48 divisors (see below), whose sum is σ = 60502819104. Its totient is φ = 5171180640.

The previous prime is 21331121113. The next prime is 21331121137. The reversal of 21331121130 is 3112113312.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21331121137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10772304 + ... + 10774283.

It is an arithmetic number, because the mean of its divisors is an integer number (1260475398).

Almost surely, 2^21331121130 is an apocalyptic number.

21331121130 is an abundant number, since it is smaller than the sum of its proper divisors (39171697974).

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

21331121130 is a wasteful number, since it uses less digits than its factorization.

21331121130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21546611 (or 21546608 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21331121130 its reverse (3112113312), we get a palindrome (24443234442).

The spelling of 21331121130 in words is "twenty-one billion, three hundred thirty-one million, one hundred twenty-one thousand, one hundred thirty".