121223445 has 16 divisors (see below), whose sum is σ = 221665920. Its totient is φ = 55416384.

The previous prime is 121223419. The next prime is 121223461. The reversal of 121223445 is 544322121.

It is not a de Polignac number, because 121223445 - 2⁶ = 121223381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577150 + ... + 577359.

It is an arithmetic number, because the mean of its divisors is an integer number (13854120).

Almost surely, 2^121223445 is an apocalyptic number.

121223445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121223445 is a deficient number, since it is larger than the sum of its proper divisors (100442475).

121223445 is a wasteful number, since it uses less digits than its factorization.

121223445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154524.

The product of its digits is 1920, while the sum is 24.

The square root of 121223445 is about 11010.1519063090. The cubic root of 121223445 is about 494.9130139976.

Adding to 121223445 its reverse (544322121), we get a palindrome (665545566).

The spelling of 121223445 in words is "one hundred twenty-one million, two hundred twenty-three thousand, four hundred forty-five".