121686030 has 64 divisors (see below), whose sum is σ = 335707200. Its totient is φ = 31328640.

The previous prime is 121686029. The next prime is 121686041. The reversal of 121686030 is 30686121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 121685985 and 121686003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60 + ... + 15600.

It is an arithmetic number, because the mean of its divisors is an integer number (5245425).

Almost surely, 2^121686030 is an apocalyptic number.

121686030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121686030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167853600).

121686030 is an abundant number, since it is smaller than the sum of its proper divisors (214021170).

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

121686030 is a wasteful number, since it uses less digits than its factorization.

121686030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15586 (or 15580 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 121686030 is about 11031.1391070913. The cubic root of 121686030 is about 495.5417393069.

Subtracting from 121686030 its reverse (30686121), we obtain a palindrome (90999909).

The spelling of 121686030 in words is "one hundred twenty-one million, six hundred eighty-six thousand, thirty".