121405630 has 16 divisors (see below), whose sum is σ = 230032080. Its totient is φ = 46006272.

The previous prime is 121405607. The next prime is 121405631. The reversal of 121405630 is 36504121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121405631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319299 + ... + 319678.

It is an arithmetic number, because the mean of its divisors is an integer number (14377005).

Almost surely, 2^121405630 is an apocalyptic number.

121405630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121405630 is a deficient number, since it is larger than the sum of its proper divisors (108626450).

121405630 is a wasteful number, since it uses less digits than its factorization.

121405630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639003.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 121405630 is about 11018.4223008560. The cubic root of 121405630 is about 495.1608224848.

Adding to 121405630 its reverse (36504121), we get a palindrome (157909751).

The spelling of 121405630 in words is "one hundred twenty-one million, four hundred five thousand, six hundred thirty".