121800854 has 16 divisors (see below), whose sum is σ = 213658368. Its totient is φ = 50986152.

The previous prime is 121800827. The next prime is 121800859. The reversal of 121800854 is 458008121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121800859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100562 + ... + 101765.

It is an arithmetic number, because the mean of its divisors is an integer number (13353648).

Almost surely, 2^121800854 is an apocalyptic number.

121800854 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

121800854 is a deficient number, since it is larger than the sum of its proper divisors (91857514).

121800854 is a wasteful number, since it uses less digits than its factorization.

121800854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202379.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 121800854 is about 11036.3424194794. The cubic root of 121800854 is about 495.6975561439.

Adding to 121800854 its reverse (458008121), we get a palindrome (579808975).

The spelling of 121800854 in words is "one hundred twenty-one million, eight hundred thousand, eight hundred fifty-four".