121330 has 16 divisors (see below), whose sum is σ = 238464. Its totient is φ = 44080.

The previous prime is 121327. The next prime is 121333. The reversal of 121330 is 33121.

121330 = T₃₇ + T₃₈ + ... + T₉₁.

121330 = 12² + 13² + ... + 71².

It is an interprime number because it is at equal distance from previous prime (121327) and next prime (121333).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442 + ... + 661.

It is an arithmetic number, because the mean of its divisors is an integer number (14904).

2¹²¹³³⁰ is an apocalyptic number.

121330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121330 is a deficient number, since it is larger than the sum of its proper divisors (117134).

121330 is a wasteful number, since it uses less digits than its factorization.

121330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 121330 is about 348.3245612931. The cubic root of 121330 is about 49.5057980489.

Adding to 121330 its reverse (33121), we get a palindrome (154451).

Subtracting from 121330 its reverse (33121), we obtain a square (88209 = 297²).

The spelling of 121330 in words is "one hundred twenty-one thousand, three hundred thirty".