121312230 has 64 divisors (see below), whose sum is σ = 319515840. Its totient is φ = 29293056.

The previous prime is 121312229. The next prime is 121312253. The reversal of 121312230 is 32213121.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17736 + ... + 23604.

It is an arithmetic number, because the mean of its divisors is an integer number (4992435).

Almost surely, 2^121312230 is an apocalyptic number.

121312230 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 121312230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159757920).

121312230 is an abundant number, since it is smaller than the sum of its proper divisors (198203610).

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

121312230 is a wasteful number, since it uses less digits than its factorization.

121312230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5945.

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

The square root of 121312230 is about 11014.1831290387. The cubic root of 121312230 is about 495.0338105668.

Adding to 121312230 its reverse (32213121), we get a palindrome (153525351).

The spelling of 121312230 in words is "one hundred twenty-one million, three hundred twelve thousand, two hundred thirty".