2131100000321 has 4 divisors (see below), whose sum is σ = 2131178639700. Its totient is φ = 2131021360944.

The previous prime is 2131100000261. The next prime is 2131100000329. The reversal of 2131100000321 is 1230000011312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 942771089296 + 1188328911025 = 970964^2 + 1090105^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131100000321 - 2⁶ = 2131100000257 is a prime.

It is a super-2 number, since 2×2131100000321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131100000296 and 2131100000305.

It is not an unprimeable number, because it can be changed into a prime (2131100000329) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 39279026 + ... + 39333243.

It is an arithmetic number, because the mean of its divisors is an integer number (532794659925).

Almost surely, 2^{2131100000321} is an apocalyptic number.

It is an amenable number.

2131100000321 is a deficient number, since it is larger than the sum of its proper divisors (78639379).

2131100000321 is an equidigital number, since it uses as much as digits as its factorization.

2131100000321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78639378.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 2131100000321 its reverse (1230000011312), we get a palindrome (3361100011633).

The spelling of 2131100000321 in words is "two trillion, one hundred thirty-one billion, one hundred million, three hundred twenty-one", and thus it is an aban number.