121660010 has 16 divisors (see below), whose sum is σ = 219501576. Its totient is φ = 48549888.

The previous prime is 121660003. The next prime is 121660013. The reversal of 121660010 is 10066121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29365561 + 92294449 = 5419^2 + 9607^2 .

It is not an unprimeable number, because it can be changed into a prime (121660013) 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, 9719 + ... + 18378.

Almost surely, 2^121660010 is an apocalyptic number.

121660010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121660010 is a deficient number, since it is larger than the sum of its proper divisors (97841566).

121660010 is a wasteful number, since it uses less digits than its factorization.

121660010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28537.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 121660010 is about 11029.9596554113. The cubic root of 121660010 is about 495.5064163938.

The spelling of 121660010 in words is "one hundred twenty-one million, six hundred sixty thousand, ten".