121361644 has 6 divisors (see below), whose sum is σ = 212382884. Its totient is φ = 60680820.

The previous prime is 121361641. The next prime is 121361651. The reversal of 121361644 is 446163121.

It is not an unprimeable number, because it can be changed into a prime (121361641) by changing a digit.

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 as a sum of consecutive naturals, namely, 15170202 + ... + 15170209.

Almost surely, 2^121361644 is an apocalyptic number.

It is an amenable number.

121361644 is a deficient number, since it is larger than the sum of its proper divisors (91021240).

121361644 is a wasteful number, since it uses less digits than its factorization.

121361644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30340415 (or 30340413 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 121361644 is about 11016.4260992393. The cubic root of 121361644 is about 495.1010153330.

The spelling of 121361644 in words is "one hundred twenty-one million, three hundred sixty-one thousand, six hundred forty-four".