21031143130 has 16 divisors (see below), whose sum is σ = 39848482080. Its totient is φ = 7969696272.

The previous prime is 21031143097. The next prime is 21031143181. The reversal of 21031143130 is 3134113012.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 21031143098 and 21031143107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55344924 + ... + 55345303.

It is an arithmetic number, because the mean of its divisors is an integer number (2490530130).

Almost surely, 2^21031143130 is an apocalyptic number.

21031143130 is a deficient number, since it is larger than the sum of its proper divisors (18817338950).

21031143130 is a wasteful number, since it uses less digits than its factorization.

21031143130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110690253.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21031143130 its reverse (3134113012), we get a palindrome (24165256142).

The spelling of 21031143130 in words is "twenty-one billion, thirty-one million, one hundred forty-three thousand, one hundred thirty".