21131030144321 has 8 divisors (see below), whose sum is σ = 21142632000000. Its totient is φ = 21119428803600.

The previous prime is 21131030144309. The next prime is 21131030144347. The reversal of 21131030144321 is 12344103013112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21131030144321 - 2⁴² = 16732983633217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21131030144221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105555680 + ... + 105755678.

It is an arithmetic number, because the mean of its divisors is an integer number (2642829000000).

Almost surely, 2^{21131030144321} is an apocalyptic number.

It is an amenable number.

21131030144321 is a deficient number, since it is larger than the sum of its proper divisors (11601855679).

21131030144321 is a wasteful number, since it uses less digits than its factorization.

21131030144321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257479.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 21131030144321 its reverse (12344103013112), we get a palindrome (33475133157433).

The spelling of 21131030144321 in words is "twenty-one trillion, one hundred thirty-one billion, thirty million, one hundred forty-four thousand, three hundred twenty-one".