121181930 has 8 divisors (see below), whose sum is σ = 218127492. Its totient is φ = 48472768.

The previous prime is 121181927. The next prime is 121181939. The reversal of 121181930 is 39181121.

It can be written as a sum of positive squares in 2 ways, for example, as 118178641 + 3003289 = 10871^2 + 1733^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×121181930⁴ (a number of 33 digits) contains 4444 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121181930.

It is not an unprimeable number, because it can be changed into a prime (121181939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6059087 + ... + 6059106.

Almost surely, 2^121181930 is an apocalyptic number.

121181930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121181930 is a deficient number, since it is larger than the sum of its proper divisors (96945562).

121181930 is a wasteful number, since it uses less digits than its factorization.

121181930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12118200.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 121181930 is about 11008.2664393627. The cubic root of 121181930 is about 494.8565104621.

The spelling of 121181930 in words is "one hundred twenty-one million, one hundred eighty-one thousand, nine hundred thirty".