21031310130 has 32 divisors (see below), whose sum is σ = 53444271744. Its totient is φ = 5278446336.

The previous prime is 21031310099. The next prime is 21031310141. The reversal of 21031310130 is 3101313012.

It is a super-3 number, since 3×21031310130³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20618422 + ... + 20619441.

It is an arithmetic number, because the mean of its divisors is an integer number (1670133492).

Almost surely, 2^21031310130 is an apocalyptic number.

21031310130 is an abundant number, since it is smaller than the sum of its proper divisors (32412961614).

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

21031310130 is a wasteful number, since it uses less digits than its factorization.

21031310130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41237890.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21031310130 its reverse (3101313012), we get a palindrome (24132623142).

The spelling of 21031310130 in words is "twenty-one billion, thirty-one million, three hundred ten thousand, one hundred thirty".