121308490 has 8 divisors (see below), whose sum is σ = 218355300. Its totient is φ = 48523392.

The previous prime is 121308469. The next prime is 121308503. The reversal of 121308490 is 94803121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 111999889 + 9308601 = 10583^2 + 3051^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 6065415 + ... + 6065434.

Almost surely, 2^121308490 is an apocalyptic number.

121308490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121308490 is a deficient number, since it is larger than the sum of its proper divisors (97046810).

121308490 is a wasteful number, since it uses less digits than its factorization.

121308490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12130856.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 121308490 is about 11014.0133466416. The cubic root of 121308490 is about 495.0287232933.

The spelling of 121308490 in words is "one hundred twenty-one million, three hundred eight thousand, four hundred ninety".