121217803 has 16 divisors (see below), whose sum is σ = 148760064. Its totient is φ = 96405120.

The previous prime is 121217791. The next prime is 121217819. The reversal of 121217803 is 308712121.

It is a happy number.

It is not a de Polignac number, because 121217803 - 2¹³ = 121209611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121211803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1276 + ... + 15622.

It is an arithmetic number, because the mean of its divisors is an integer number (9297504).

Almost surely, 2^121217803 is an apocalyptic number.

121217803 is a deficient number, since it is larger than the sum of its proper divisors (27542261).

121217803 is a wasteful number, since it uses less digits than its factorization.

121217803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14442.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 121217803 is about 11009.8956852461. The cubic root of 121217803 is about 494.9053357729.

Adding to 121217803 its reverse (308712121), we get a palindrome (429929924).

The spelling of 121217803 in words is "one hundred twenty-one million, two hundred seventeen thousand, eight hundred three".