121244805 has 24 divisors (see below), whose sum is σ = 229263840. Its totient is φ = 58785120.

The previous prime is 121244777. The next prime is 121244807. The reversal of 121244805 is 508442121.

121244805 is a `hidden beast` number, since 1 + 212 + 448 + 0 + 5 = 666.

It is not a de Polignac number, because 121244805 - 2¹⁰ = 121243781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121244807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121975 + ... + 122964.

It is an arithmetic number, because the mean of its divisors is an integer number (9552660).

Almost surely, 2^121244805 is an apocalyptic number.

121244805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121244805 is a deficient number, since it is larger than the sum of its proper divisors (108019035).

121244805 is a wasteful number, since it uses less digits than its factorization.

121244805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244961 (or 244958 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 121244805 is about 11011.1218774474. The cubic root of 121244805 is about 494.9420807653.

Adding to 121244805 its reverse (508442121), we get a palindrome (629686926).

The spelling of 121244805 in words is "one hundred twenty-one million, two hundred forty-four thousand, eight hundred five".