121240444 has 72 divisors (see below), whose sum is σ = 249903920. Its totient is φ = 51010560.

The previous prime is 121240439. The next prime is 121240451. The reversal of 121240444 is 444042121.

It is a super-2 number, since 2×121240444² = 29398490522634272, 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 (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1660792 + ... + 1660864.

Almost surely, 2^121240444 is an apocalyptic number.

It is an amenable number.

121240444 is an abundant number, since it is smaller than the sum of its proper divisors (128663476).

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

121240444 is a wasteful number, since it uses less digits than its factorization.

121240444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 121240444 is about 11010.9238486151. The cubic root of 121240444 is about 494.9361465776.

Adding to 121240444 its reverse (444042121), we get a palindrome (565282565).

The spelling of 121240444 in words is "one hundred twenty-one million, two hundred forty thousand, four hundred forty-four".