21031320012130 has 32 divisors (see below), whose sum is σ = 38043279072000. Its totient is φ = 8371070000832.

The previous prime is 21031320012121. The next prime is 21031320012169. The reversal of 21031320012130 is 3121002313012.

It is a junction number, because it is equal to n+sod(n) for n = 21031320012098 and 21031320012107.

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, 2536030 + ... + 6963769.

It is an arithmetic number, because the mean of its divisors is an integer number (1188852471000).

Almost surely, 2^{21031320012130} is an apocalyptic number.

21031320012130 is a deficient number, since it is larger than the sum of its proper divisors (17011959059870).

21031320012130 is a wasteful number, since it uses less digits than its factorization.

21031320012130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9500898.

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

Adding to 21031320012130 its reverse (3121002313012), we get a palindrome (24152322325142).

The spelling of 21031320012130 in words is "twenty-one trillion, thirty-one billion, three hundred twenty million, twelve thousand, one hundred thirty".