100021342009 has 2 divisors, whose sum is σ = 100021342010. Its totient is φ = 100021342008.

The previous prime is 100021341971. The next prime is 100021342027. The reversal of 100021342009 is 900243120001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95036558400 + 4984783609 = 308280^2 + 70603^2 .

It is an emirp because it is prime and its reverse (900243120001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100021342009 - 2²⁵ = 99987787577 is a prime.

It is not a weakly prime, because it can be changed into another prime (100021342609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010671004 + 50010671005.

It is an arithmetic number, because the mean of its divisors is an integer number (50010671005).

Almost surely, 2^100021342009 is an apocalyptic number.

It is an amenable number.

100021342009 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021342009 is an equidigital number, since it uses as much as digits as its factorization.

100021342009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 100021342009 in words is "one hundred billion, twenty-one million, three hundred forty-two thousand, nine".