121223530 has 16 divisors (see below), whose sum is σ = 218816640. Its totient is φ = 48352912.

The previous prime is 121223527. The next prime is 121223551. The reversal of 121223530 is 35322121.

It is a junction number, because it is equal to n+sod(n) for n = 121223498 and 121223507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13294 + ... + 20473.

It is an arithmetic number, because the mean of its divisors is an integer number (13676040).

Almost surely, 2^121223530 is an apocalyptic number.

121223530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121223530 is a deficient number, since it is larger than the sum of its proper divisors (97593110).

121223530 is a wasteful number, since it uses less digits than its factorization.

121223530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34133.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 121223530 is about 11010.1557663822. The cubic root of 121223530 is about 494.9131296727.

Adding to 121223530 its reverse (35322121), we get a palindrome (156545651).

It can be divided in two parts, 1212 and 23530, that added together give a palindrome (24742).

The spelling of 121223530 in words is "one hundred twenty-one million, two hundred twenty-three thousand, five hundred thirty".