121394388 has 48 divisors (see below), whose sum is σ = 297400320. Its totient is φ = 38488800.

The previous prime is 121394381. The next prime is 121394411. The reversal of 121394388 is 883493121.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121394381) 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, 19183 + ... + 24713.

It is an arithmetic number, because the mean of its divisors is an integer number (6195840).

Almost surely, 2^121394388 is an apocalyptic number.

It is an amenable number.

121394388 is an abundant number, since it is smaller than the sum of its proper divisors (176005932).

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

121394388 is a wasteful number, since it uses less digits than its factorization.

121394388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628 (or 5626 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 121394388 is about 11017.9121434145. The cubic root of 121394388 is about 495.1455382683.

The spelling of 121394388 in words is "one hundred twenty-one million, three hundred ninety-four thousand, three hundred eighty-eight".