121451650 has 12 divisors (see below), whose sum is σ = 225900162. Its totient is φ = 48580640.

The previous prime is 121451641. The next prime is 121451669. The reversal of 121451650 is 56154121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 107931321 + 13520329 = 10389^2 + 3677^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

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 5 ways as a sum of consecutive naturals, for example, 1214467 + ... + 1214566.

Almost surely, 2^121451650 is an apocalyptic number.

121451650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121451650 is a deficient number, since it is larger than the sum of its proper divisors (104448512).

121451650 is a wasteful number, since it uses less digits than its factorization.

121451650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429045 (or 2429040 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 121451650 is about 11020.5104237508. The cubic root of 121451650 is about 495.2233797770.

The spelling of 121451650 in words is "one hundred twenty-one million, four hundred fifty-one thousand, six hundred fifty".