121700000 has 72 divisors (see below), whose sum is σ = 299723004. Its totient is φ = 48640000.

The previous prime is 121699987. The next prime is 121700039. The reversal of 121700000 is 7121.

It can be written as a sum of positive squares in 6 ways, for example, as 21939856 + 99760144 = 4684^2 + 9988^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99392 + ... + 100608.

Almost surely, 2^121700000 is an apocalyptic number.

121700000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121700000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149861502).

121700000 is an abundant number, since it is smaller than the sum of its proper divisors (178023004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121700000 is an frugal number, since it uses more digits than its factorization.

121700000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252 (or 1224 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 11.

The square root of 121700000 is about 11031.7722964173. The cubic root of 121700000 is about 495.5607019142.

Adding to 121700000 its reverse (7121), we get a palindrome (121707121).

The spelling of 121700000 in words is "one hundred twenty-one million, seven hundred thousand".