121898498 has 18 divisors (see below), whose sum is σ = 188817993. Its totient is φ = 59020920.

The previous prime is 121898489. The next prime is 121898503. The reversal of 121898498 is 894898121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 98346889 + 23551609 = 9917^2 + 4853^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=7807.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 577613 + ... + 577823.

Almost surely, 2^121898498 is an apocalyptic number.

121898498 is a deficient number, since it is larger than the sum of its proper divisors (66919495).

121898498 is an frugal number, since it uses more digits than its factorization.

121898498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 250 counting only the distinct ones).

The product of its digits is 331776, while the sum is 50.

The square root of 121898498 is about 11040.7652814468. The cubic root of 121898498 is about 495.8299825931.

Multiplying 121898498 by its sum of digits (50), we get a square (6094924900 = 78070²).

The spelling of 121898498 in words is "one hundred twenty-one million, eight hundred ninety-eight thousand, four hundred ninety-eight".