121223340 has 288 divisors, whose sum is σ = 452874240. Its totient is φ = 25648128.

The previous prime is 121223279. The next prime is 121223351. The reversal of 121223340 is 43322121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1362016 + ... + 1362104.

It is an arithmetic number, because the mean of its divisors is an integer number (1572480).

Almost surely, 2^121223340 is an apocalyptic number.

121223340 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 121223340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226437120).

121223340 is an abundant number, since it is smaller than the sum of its proper divisors (331650900).

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

121223340 is a wasteful number, since it uses less digits than its factorization.

121223340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 121223340 is about 11010.1471379814. The cubic root of 121223340 is about 494.9128711048.

Adding to 121223340 its reverse (43322121), we get a palindrome (164545461).

The spelling of 121223340 in words is "one hundred twenty-one million, two hundred twenty-three thousand, three hundred forty".