21130042302 has 12 divisors (see below), whose sum is σ = 45781758360. Its totient is φ = 7043347428.

The previous prime is 21130042301. The next prime is 21130042303. The reversal of 21130042302 is 20324003112.

21130042302 is a `hidden beast` number, since 21 + 1 + 300 + 42 + 302 = 666.

It is an interprime number because it is at equal distance from previous prime (21130042301) and next prime (21130042303).

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1173891239 = 21130042302 / (2 + 1 + 1 + 3 + 0 + 0 + 4 + 2 + 3 + 0 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130042301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 586945602 + ... + 586945637.

It is an arithmetic number, because the mean of its divisors is an integer number (3815146530).

Almost surely, 2^21130042302 is an apocalyptic number.

21130042302 is an abundant number, since it is smaller than the sum of its proper divisors (24651716058).

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

21130042302 is a wasteful number, since it uses less digits than its factorization.

21130042302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173891247 (or 1173891244 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21130042302 its reverse (20324003112), we get a palindrome (41454045414).

The spelling of 21130042302 in words is "twenty-one billion, one hundred thirty million, forty-two thousand, three hundred two".