121898041321 has 9 divisors (see below), whose sum is σ = 141802605399. Its totient is φ = 104481940584.

The previous prime is 121898041303. The next prime is 121898041339. The reversal of 121898041321 is 123140898121.

The square root of 121898041321 is 349139.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (121898041303) and next prime (121898041339).

It can be written as a sum of positive squares in only one way, i.e., 2572011225 + 119326030096 = 50715^2 + 345436^2 .

It is not a de Polignac number, because 121898041321 - 2²³ = 121889652713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121898041351) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2419035 + ... + 2468911.

Almost surely, 2^121898041321 is an apocalyptic number.

121898041321 is the 349139-th square number.

121898041321 is the 174570-th centered octagonal number.

It is an amenable number.

121898041321 is a deficient number, since it is larger than the sum of its proper divisors (19904564078).

121898041321 is an frugal number, since it uses more digits than its factorization.

121898041321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99768 (or 49884 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 40.

The spelling of 121898041321 in words is "one hundred twenty-one billion, eight hundred ninety-eight million, forty-one thousand, three hundred twenty-one".