121666252 has 12 divisors (see below), whose sum is σ = 220258080. Its totient is φ = 58735376.

The previous prime is 121666247. The next prime is 121666267. The reversal of 121666252 is 252666121.

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, 524308 + ... + 524539.

It is an arithmetic number, because the mean of its divisors is an integer number (18354840).

Almost surely, 2^121666252 is an apocalyptic number.

It is an amenable number.

121666252 is a deficient number, since it is larger than the sum of its proper divisors (98591828).

121666252 is a wasteful number, since it uses less digits than its factorization.

121666252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048880 (or 1048878 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 121666252 is about 11030.2426083926. The cubic root of 121666252 is about 495.5148905510.

The spelling of 121666252 in words is "one hundred twenty-one million, six hundred sixty-six thousand, two hundred fifty-two".