9800121379 has 2 divisors, whose sum is σ = 9800121380. Its totient is φ = 9800121378.

The previous prime is 9800121371. The next prime is 9800121433. The reversal of 9800121379 is 9731210089.

It is a weak prime.

It is an emirp because it is prime and its reverse (9731210089) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9800121379 - 2³ = 9800121371 is a prime.

It is not a weakly prime, because it can be changed into another prime (9800121371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4900060689 + 4900060690.

It is an arithmetic number, because the mean of its divisors is an integer number (4900060690).

Almost surely, 2^9800121379 is an apocalyptic number.

9800121379 is a deficient number, since it is larger than the sum of its proper divisors (1).

9800121379 is an equidigital number, since it uses as much as digits as its factorization.

9800121379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 9800121379 is about 98995.5624207469. The cubic root of 9800121379 is about 2139.9837960604.

The spelling of 9800121379 in words is "nine billion, eight hundred million, one hundred twenty-one thousand, three hundred seventy-nine".