121775530 has 8 divisors (see below), whose sum is σ = 219195972. Its totient is φ = 48710208.

The previous prime is 121775497. The next prime is 121775531. The reversal of 121775530 is 35577121.

It can be written as a sum of positive squares in 2 ways, for example, as 117961321 + 3814209 = 10861^2 + 1953^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 121775492 and 121775501.

It is not an unprimeable number, because it can be changed into a prime (121775531) 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, 6088767 + ... + 6088786.

Almost surely, 2^121775530 is an apocalyptic number.

121775530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121775530 is a deficient number, since it is larger than the sum of its proper divisors (97420442).

121775530 is a wasteful number, since it uses less digits than its factorization.

121775530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12177560.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 121775530 is about 11035.1950594450. The cubic root of 121775530 is about 495.6631997483.

The spelling of 121775530 in words is "one hundred twenty-one million, seven hundred seventy-five thousand, five hundred thirty".