20430131320221 has 64 divisors (see below), whose sum is σ = 31488007495680. Its totient is φ = 11541457912320.

The previous prime is 20430131320211. The next prime is 20430131320241. The reversal of 20430131320221 is 12202313103402.

It is not a de Polignac number, because 20430131320221 - 2⁵ = 20430131320189 is a prime.

It is a super-2 number, since 2×20430131320221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20430131320191 and 20430131320200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430131320211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2609541535 + ... + 2609549363.

It is an arithmetic number, because the mean of its divisors is an integer number (492000117120).

Almost surely, 2^{20430131320221} is an apocalyptic number.

20430131320221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20430131320221 is a deficient number, since it is larger than the sum of its proper divisors (11057876175459).

20430131320221 is a wasteful number, since it uses less digits than its factorization.

20430131320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11594.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20430131320221 its reverse (12202313103402), we get a palindrome (32632444423623).

The spelling of 20430131320221 in words is "twenty trillion, four hundred thirty billion, one hundred thirty-one million, three hundred twenty thousand, two hundred twenty-one".