121244819 has 16 divisors (see below), whose sum is σ = 128504448. Its totient is φ = 114250752.

The previous prime is 121244807. The next prime is 121244843. The reversal of 121244819 is 918442121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121244819 - 2¹² = 121240723 is a prime.

It is a super-2 number, since 2×121244819² = 29400612268685522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121244899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196199 + ... + 196815.

It is an arithmetic number, because the mean of its divisors is an integer number (8031528).

Almost surely, 2^121244819 is an apocalyptic number.

121244819 is a deficient number, since it is larger than the sum of its proper divisors (7259629).

121244819 is a wasteful number, since it uses less digits than its factorization.

121244819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814.

The product of its digits is 4608, while the sum is 32.

The square root of 121244819 is about 11011.1225131682. The cubic root of 121244819 is about 494.9420998154.

The spelling of 121244819 in words is "one hundred twenty-one million, two hundred forty-four thousand, eight hundred nineteen".