121930 has 16 divisors (see below), whose sum is σ = 223560. Its totient is φ = 47872.

The previous prime is 121921. The next prime is 121931. The reversal of 121930 is 39121.

Added to its reverse (39121) it gives a 5-th power (161051 = 11⁵).

It can be written as a sum of positive squares in 4 ways, for example, as 84681 + 37249 = 291^2 + 193^2 .

It is not an unprimeable number, because it can be changed into a prime (121931) 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, 822 + ... + 958.

2¹²¹⁹³⁰ is an apocalyptic number.

121930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121930 is a deficient number, since it is larger than the sum of its proper divisors (101630).

121930 is a wasteful number, since it uses less digits than its factorization.

121930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 121930 is about 349.1847648452. The cubic root of 121930 is about 49.5872691052.

Adding to 121930 its reverse (39121), we get a 5-th power (161051 = 11⁵).

The spelling of 121930 in words is "one hundred twenty-one thousand, nine hundred thirty".