121233210 has 128 divisors (see below), whose sum is σ = 346374144. Its totient is φ = 26584320.

The previous prime is 121233199. The next prime is 121233221. The reversal of 121233210 is 12332121.

It is an interprime number because it is at equal distance from previous prime (121233199) and next prime (121233221).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121233210.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 700684 + ... + 700856.

It is an arithmetic number, because the mean of its divisors is an integer number (2706048).

Almost surely, 2^121233210 is an apocalyptic number.

121233210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121233210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173187072).

121233210 is an abundant number, since it is smaller than the sum of its proper divisors (225140934).

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

121233210 is a wasteful number, since it uses less digits than its factorization.

121233210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 121233210 is about 11010.5953517510. The cubic root of 121233210 is about 494.9263026697.

Adding to 121233210 its reverse (12332121), we get a palindrome (133565331).

The spelling of 121233210 in words is "one hundred twenty-one million, two hundred thirty-three thousand, two hundred ten".