121323020 has 144 divisors (see below), whose sum is σ = 325775520. Its totient is φ = 37610496.

The previous prime is 121323017. The next prime is 121323029. The reversal of 121323020 is 20323121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 121322986 and 121323004.

It is not an unprimeable number, because it can be changed into a prime (121323029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1133807 + ... + 1133913.

It is an arithmetic number, because the mean of its divisors is an integer number (2262330).

Almost surely, 2^121323020 is an apocalyptic number.

121323020 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 121323020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162887760).

121323020 is an abundant number, since it is smaller than the sum of its proper divisors (204452500).

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

121323020 is a wasteful number, since it uses less digits than its factorization.

121323020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 121323020 is about 11014.6729411272. The cubic root of 121323020 is about 495.0484869009.

Adding to 121323020 its reverse (20323121), we get a palindrome (141646141).

The spelling of 121323020 in words is "one hundred twenty-one million, three hundred twenty-three thousand, twenty".