121828186 has 4 divisors (see below), whose sum is σ = 182742282. Its totient is φ = 60914092.

The previous prime is 121828169. The next prime is 121828193. The reversal of 121828186 is 681828121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 681828121 = 13 ⋅52448317.

It can be written as a sum of positive squares in only one way, i.e., 74287161 + 47541025 = 8619^2 + 6895^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30457045 + ... + 30457048.

Almost surely, 2^121828186 is an apocalyptic number.

121828186 is a deficient number, since it is larger than the sum of its proper divisors (60914096).

121828186 is an equidigital number, since it uses as much as digits as its factorization.

121828186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60914095.

The product of its digits is 12288, while the sum is 37.

The square root of 121828186 is about 11037.5806225821. The cubic root of 121828186 is about 495.7346313966.

The spelling of 121828186 in words is "one hundred twenty-one million, eight hundred twenty-eight thousand, one hundred eighty-six".