2131110320221 has 8 divisors (see below), whose sum is σ = 2145304572704. Its totient is φ = 2116954692720.

The previous prime is 2131110320219. The next prime is 2131110320257. The reversal of 2131110320221 is 1220230111312.

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 2131110320221 - 2¹ = 2131110320219 is a prime.

It is a super-2 number, since 2×2131110320221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131110120221) 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, 9545526 + ... + 9766231.

It is an arithmetic number, because the mean of its divisors is an integer number (268163071588).

Almost surely, 2^{2131110320221} is an apocalyptic number.

It is an amenable number.

2131110320221 is a deficient number, since it is larger than the sum of its proper divisors (14194252483).

2131110320221 is a wasteful number, since it uses less digits than its factorization.

2131110320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19312491.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2131110320221 its reverse (1220230111312), we get a palindrome (3351340431533).

The spelling of 2131110320221 in words is "two trillion, one hundred thirty-one billion, one hundred ten million, three hundred twenty thousand, two hundred twenty-one".