100121650 has 24 divisors (see below), whose sum is σ = 186924420. Its totient is φ = 39898560.

The previous prime is 100121639. The next prime is 100121669. The reversal of 100121650 is 56121001.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 54922921 + 45198729 = 7411^2 + 6723^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10236 + ... + 17464.

Almost surely, 2^100121650 is an apocalyptic number.

100121650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100121650 is a deficient number, since it is larger than the sum of its proper divisors (86802770).

100121650 is a wasteful number, since it uses less digits than its factorization.

100121650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7518 (or 7513 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 100121650 is about 10006.0806512840. The cubic root of 100121650 is about 464.3470235183.

Adding to 100121650 its reverse (56121001), we get a palindrome (156242651).

The spelling of 100121650 in words is "one hundred million, one hundred twenty-one thousand, six hundred fifty".