121223390 has 8 divisors (see below), whose sum is σ = 218202120. Its totient is φ = 48489352.

The previous prime is 121223381. The next prime is 121223411. The reversal of 121223390 is 93322121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×121223390² = 29390220566184200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6061160 + ... + 6061179.

It is an arithmetic number, because the mean of its divisors is an integer number (27275265).

Almost surely, 2^121223390 is an apocalyptic number.

121223390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121223390 is a deficient number, since it is larger than the sum of its proper divisors (96978730).

121223390 is a wasteful number, since it uses less digits than its factorization.

121223390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12122346.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 121223390 is about 11010.1494086139. The cubic root of 121223390 is about 494.9129391490.

The spelling of 121223390 in words is "one hundred twenty-one million, two hundred twenty-three thousand, three hundred ninety".