2101436321 has 2 divisors, whose sum is σ = 2101436322. Its totient is φ = 2101436320.

The previous prime is 2101436221. The next prime is 2101436371. The reversal of 2101436321 is 1236341012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1978470400 + 122965921 = 44480^2 + 11089^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101436321 - 2¹⁴ = 2101419937 is a prime.

It is a super-2 number, since 2×2101436321² = 8832069222436030082, which contains 22 as substring.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2101436371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050718160 + 1050718161.

It is an arithmetic number, because the mean of its divisors is an integer number (1050718161).

Almost surely, 2^2101436321 is an apocalyptic number.

It is an amenable number.

2101436321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101436321 is an equidigital number, since it uses as much as digits as its factorization.

2101436321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2101436321 is about 45841.4258177034. The cubic root of 2101436321 is about 1280.8710544420.

Adding to 2101436321 its reverse (1236341012), we get a palindrome (3337777333).

The spelling of 2101436321 in words is "two billion, one hundred one million, four hundred thirty-six thousand, three hundred twenty-one".