21131233130 has 128 divisors (see below), whose sum is σ = 45304842240. Its totient is φ = 6946560000.

The previous prime is 21131233069. The next prime is 21131233157. The reversal of 21131233130 is 3133213112.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77974895 + ... + 77975165.

It is an arithmetic number, because the mean of its divisors is an integer number (353944080).

Almost surely, 2^21131233130 is an apocalyptic number.

21131233130 is an abundant number, since it is smaller than the sum of its proper divisors (24173609110).

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

21131233130 is a wasteful number, since it uses less digits than its factorization.

21131233130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21131233130 its reverse (3133213112), we get a palindrome (24264446242).

It can be divided in two parts, 211312 and 33130, that added together give a palindrome (244442).

The spelling of 21131233130 in words is "twenty-one billion, one hundred thirty-one million, two hundred thirty-three thousand, one hundred thirty".