121663356 has 48 divisors (see below), whose sum is σ = 304002720. Its totient is φ = 37734400.

The previous prime is 121663351. The next prime is 121663379. The reversal of 121663356 is 653366121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121663351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14806 + ... + 21506.

It is an arithmetic number, because the mean of its divisors is an integer number (6333390).

Almost surely, 2^121663356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121663356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152001360).

121663356 is an abundant number, since it is smaller than the sum of its proper divisors (182339364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121663356 is a wasteful number, since it uses less digits than its factorization.

121663356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6814 (or 6812 counting only the distinct ones).

The product of its digits is 19440, while the sum is 33.

The square root of 121663356 is about 11030.1113321671. Note that the first 3 decimals coincide. The cubic root of 121663356 is about 495.5109589691.

The spelling of 121663356 in words is "one hundred twenty-one million, six hundred sixty-three thousand, three hundred fifty-six".