121668396 has 12 divisors (see below), whose sum is σ = 283892952. Its totient is φ = 40556128.

The previous prime is 121668389. The next prime is 121668403. The reversal of 121668396 is 693866121.

It is an interprime number because it is at equal distance from previous prime (121668389) and next prime (121668403).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5069505 + ... + 5069528.

It is an arithmetic number, because the mean of its divisors is an integer number (23657746).

Almost surely, 2^121668396 is an apocalyptic number.

It is an amenable number.

121668396 is an abundant number, since it is smaller than the sum of its proper divisors (162224556).

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

121668396 is a wasteful number, since it uses less digits than its factorization.

121668396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10139040 (or 10139038 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 121668396 is about 11030.3397953100. The cubic root of 121668396 is about 495.5178011847.

The spelling of 121668396 in words is "one hundred twenty-one million, six hundred sixty-eight thousand, three hundred ninety-six".