121396830 has 64 divisors (see below), whose sum is σ = 311620608. Its totient is φ = 30159360.

The previous prime is 121396819. The next prime is 121396843. The reversal of 121396830 is 38693121.

It is a junction number, because it is equal to n+sod(n) for n = 121396791 and 121396800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51375 + ... + 53685.

It is an arithmetic number, because the mean of its divisors is an integer number (4869072).

Almost surely, 2^121396830 is an apocalyptic number.

121396830 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 121396830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155810304).

121396830 is an abundant number, since it is smaller than the sum of its proper divisors (190223778).

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

121396830 is a wasteful number, since it uses less digits than its factorization.

121396830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 121396830 is about 11018.0229624012. The cubic root of 121396830 is about 495.1488584034.

The spelling of 121396830 in words is "one hundred twenty-one million, three hundred ninety-six thousand, eight hundred thirty".