9898765432121 has 8 divisors (see below), whose sum is σ = 9905296821024. Its totient is φ = 9892235646720.

The previous prime is 9898765432067. The next prime is 9898765432133. The reversal of 9898765432121 is 1212345678989.

9898765432121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9898765432121 - 2²⁶ = 9898698323257 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9898765434121) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12077465 + ... + 12871001.

It is an arithmetic number, because the mean of its divisors is an integer number (1238162102628).

Almost surely, 2^{9898765432121} is an apocalyptic number.

It is an amenable number.

9898765432121 is a deficient number, since it is larger than the sum of its proper divisors (6531388903).

9898765432121 is a wasteful number, since it uses less digits than its factorization.

9898765432121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801751.

The product of its digits is 52254720, while the sum is 65.

The spelling of 9898765432121 in words is "nine trillion, eight hundred ninety-eight billion, seven hundred sixty-five million, four hundred thirty-two thousand, one hundred twenty-one".