2130521101 has 4 divisors (see below), whose sum is σ = 2134346652. Its totient is φ = 2126695552.

The previous prime is 2130521021. The next prime is 2130521111. The reversal of 2130521101 is 1011250312.

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 64818601 + 2065702500 = 8051^2 + 45450^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130521101 - 2⁹ = 2130520589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130521111) 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, 1911940 + ... + 1913053.

It is an arithmetic number, because the mean of its divisors is an integer number (533586663).

Almost surely, 2^2130521101 is an apocalyptic number.

It is an amenable number.

2130521101 is a deficient number, since it is larger than the sum of its proper divisors (3825551).

2130521101 is an equidigital number, since it uses as much as digits as its factorization.

2130521101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825550.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 2130521101 is about 46157.5681876764. The cubic root of 2130521101 is about 1286.7532681366.

Adding to 2130521101 its reverse (1011250312), we get a palindrome (3141771413).

The spelling of 2130521101 in words is "two billion, one hundred thirty million, five hundred twenty-one thousand, one hundred one".