121650644 has 12 divisors (see below), whose sum is σ = 213659124. Its totient is φ = 60605184.

The previous prime is 121650637. The next prime is 121650667. The reversal of 121650644 is 446056121.

It can be written as a sum of positive squares in 2 ways, for example, as 69522244 + 52128400 = 8338^2 + 7220^2 .

It is a super-2 number, since 2×121650644² = 29597758371229472, which contains 22 as substring.

It is a congruent number.

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, 53789 + ... + 56004.

It is an arithmetic number, because the mean of its divisors is an integer number (17804927).

Almost surely, 2^121650644 is an apocalyptic number.

It is an amenable number.

121650644 is a deficient number, since it is larger than the sum of its proper divisors (92008480).

121650644 is a wasteful number, since it uses less digits than its factorization.

121650644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110074 (or 110072 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 121650644 is about 11029.5350763303. The cubic root of 121650644 is about 495.4937005413.

The spelling of 121650644 in words is "one hundred twenty-one million, six hundred fifty thousand, six hundred forty-four".