121311730 has 8 divisors (see below), whose sum is σ = 218361132. Its totient is φ = 48524688.

The previous prime is 121311709. The next prime is 121311731. The reversal of 121311730 is 37113121.

It can be written as a sum of positive squares in 2 ways, for example, as 119443041 + 1868689 = 10929^2 + 1367^2 .

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 = 121311698 and 121311707.

It is not an unprimeable number, because it can be changed into a prime (121311731) 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, 6065577 + ... + 6065596.

Almost surely, 2^121311730 is an apocalyptic number.

121311730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121311730 is a deficient number, since it is larger than the sum of its proper divisors (97049402).

121311730 is a wasteful number, since it uses less digits than its factorization.

121311730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12131180.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 121311730 is about 11014.1604310088. The cubic root of 121311730 is about 495.0331304561.

Adding to 121311730 its reverse (37113121), we get a palindrome (158424851).

It can be divided in two parts, 12131 and 1730, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 121311730 in words is "one hundred twenty-one million, three hundred eleven thousand, seven hundred thirty".