121329686 has 4 divisors (see below), whose sum is σ = 181994532. Its totient is φ = 60664842.

The previous prime is 121329683. The next prime is 121329709. The reversal of 121329686 is 686923121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121329683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30332420 + ... + 30332423.

It is an arithmetic number, because the mean of its divisors is an integer number (45498633).

Almost surely, 2^121329686 is an apocalyptic number.

121329686 is a deficient number, since it is larger than the sum of its proper divisors (60664846).

121329686 is an equidigital number, since it uses as much as digits as its factorization.

121329686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60664845.

The product of its digits is 31104, while the sum is 38.

The square root of 121329686 is about 11014.9755333364. The cubic root of 121329686 is about 495.0575534209.

The spelling of 121329686 in words is "one hundred twenty-one million, three hundred twenty-nine thousand, six hundred eighty-six".