12121930 has 16 divisors (see below), whose sum is σ = 22523904. Its totient is φ = 4692240.

The previous prime is 12121927. The next prime is 12121931. The reversal of 12121930 is 3912121.

It is a junction number, because it is equal to n+sod(n) for n = 12121898 and 12121907.

It is not an unprimeable number, because it can be changed into a prime (12121931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19242 + ... + 19861.

It is an arithmetic number, because the mean of its divisors is an integer number (1407744).

Almost surely, 2^12121930 is an apocalyptic number.

12121930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121930 is a deficient number, since it is larger than the sum of its proper divisors (10401974).

12121930 is a wasteful number, since it uses less digits than its factorization.

12121930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39141.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 12121930 is about 3481.6562150793. The cubic root of 12121930 is about 229.7156536517.

The spelling of 12121930 in words is "twelve million, one hundred twenty-one thousand, nine hundred thirty".