121623130 has 16 divisors (see below), whose sum is σ = 219451680. Its totient is φ = 48531472.

The previous prime is 121623119. The next prime is 121623133. The reversal of 121623130 is 31326121.

121623130 = 4930² + 4931² + ... + 4934².

It is a junction number, because it is equal to n+sod(n) for n = 121623098 and 121623107.

It is not an unprimeable number, because it can be changed into a prime (121623133) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10324 + ... + 18703.

It is an arithmetic number, because the mean of its divisors is an integer number (13715730).

Almost surely, 2^121623130 is an apocalyptic number.

121623130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121623130 is a deficient number, since it is larger than the sum of its proper divisors (97828550).

121623130 is a wasteful number, since it uses less digits than its factorization.

121623130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29453.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 121623130 is about 11028.2877184085. The cubic root of 121623130 is about 495.4563420828.

Adding to 121623130 its reverse (31326121), we get a palindrome (152949251).

The spelling of 121623130 in words is "one hundred twenty-one million, six hundred twenty-three thousand, one hundred thirty".