121302120 has 64 divisors (see below), whose sum is σ = 366145920. Its totient is φ = 32148224.

The previous prime is 121302113. The next prime is 121302127. The reversal of 121302120 is 21203121.

It is an interprime number because it is at equal distance from previous prime (121302113) and next prime (121302127).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121302096 and 121302105.

It is not an unprimeable number, because it can be changed into a prime (121302127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17014 + ... + 23066.

It is an arithmetic number, because the mean of its divisors is an integer number (5721030).

Almost surely, 2^121302120 is an apocalyptic number.

121302120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121302120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183072960).

121302120 is an abundant number, since it is smaller than the sum of its proper divisors (244843800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121302120 is a wasteful number, since it uses less digits than its factorization.

121302120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6234 (or 6230 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121302120 is about 11013.7241657852. The cubic root of 121302120 is about 495.0200583648.

Adding to 121302120 its reverse (21203121), we get a palindrome (142505241).

The spelling of 121302120 in words is "one hundred twenty-one million, three hundred two thousand, one hundred twenty".