121602388 has 6 divisors (see below), whose sum is σ = 212804186. Its totient is φ = 60801192.

The previous prime is 121602379. The next prime is 121602427. The reversal of 121602388 is 883206121.

It can be written as a sum of positive squares in only one way, i.e., 118984464 + 2617924 = 10908^2 + 1618^2 .

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, 15200295 + ... + 15200302.

Almost surely, 2^121602388 is an apocalyptic number.

It is an amenable number.

121602388 is a deficient number, since it is larger than the sum of its proper divisors (91201798).

121602388 is a wasteful number, since it uses less digits than its factorization.

121602388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30400601 (or 30400599 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 121602388 is about 11027.3472784709. The cubic root of 121602388 is about 495.4281749085.

The spelling of 121602388 in words is "one hundred twenty-one million, six hundred two thousand, three hundred eighty-eight".