121898103 has 4 divisors (see below), whose sum is σ = 162530808. Its totient is φ = 81265400.

The previous prime is 121898099. The next prime is 121898111. The reversal of 121898103 is 301898121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121898103 - 2² = 121898099 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121898003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20316348 + ... + 20316353.

It is an arithmetic number, because the mean of its divisors is an integer number (40632702).

Almost surely, 2^121898103 is an apocalyptic number.

121898103 is a deficient number, since it is larger than the sum of its proper divisors (40632705).

121898103 is an equidigital number, since it uses as much as digits as its factorization.

121898103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40632704.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 121898103 is about 11040.7473931795. The cubic root of 121898103 is about 495.8294470299.

The spelling of 121898103 in words is "one hundred twenty-one million, eight hundred ninety-eight thousand, one hundred three".