121661336 has 8 divisors (see below), whose sum is σ = 228115020. Its totient is φ = 60830664.

The previous prime is 121661327. The next prime is 121661357. The reversal of 121661336 is 633166121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 121661299 and 121661308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7603826 + ... + 7603841.

Almost surely, 2^121661336 is an apocalyptic number.

It is an amenable number.

121661336 is a deficient number, since it is larger than the sum of its proper divisors (106453684).

121661336 is a wasteful number, since it uses less digits than its factorization.

121661336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15207673 (or 15207669 counting only the distinct ones).

The product of its digits is 3888, while the sum is 29.

The square root of 121661336 is about 11030.0197642615. The cubic root of 121661336 is about 495.5082165994.

The spelling of 121661336 in words is "one hundred twenty-one million, six hundred sixty-one thousand, three hundred thirty-six".