21031323220130 has 32 divisors (see below), whose sum is σ = 38798993495808. Its totient is φ = 8203264099200.

The previous prime is 21031323220109. The next prime is 21031323220163. The reversal of 21031323220130 is 3102232313012.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21031323220096 and 21031323220105.

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 15 ways as a sum of consecutive naturals, for example, 11929322 + ... + 13578341.

It is an arithmetic number, because the mean of its divisors is an integer number (1212468546744).

Almost surely, 2^{21031323220130} is an apocalyptic number.

21031323220130 is a deficient number, since it is larger than the sum of its proper divisors (17767670275678).

21031323220130 is a wasteful number, since it uses less digits than its factorization.

21031323220130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25509722.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21031323220130 its reverse (3102232313012), we get a palindrome (24133555533142).

The spelling of 21031323220130 in words is "twenty-one trillion, thirty-one billion, three hundred twenty-three million, two hundred twenty thousand, one hundred thirty".