20121124 has 12 divisors (see below), whose sum is σ = 35809200. Its totient is φ = 9889928.

The previous prime is 20121121. The next prime is 20121137. The reversal of 20121124 is 42112102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20121121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42394 + ... + 42865.

It is an arithmetic number, because the mean of its divisors is an integer number (2984100).

Almost surely, 2^20121124 is an apocalyptic number.

It is an amenable number.

20121124 is a deficient number, since it is larger than the sum of its proper divisors (15688076).

20121124 is a wasteful number, since it uses less digits than its factorization.

20121124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85322 (or 85320 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 20121124 is about 4485.6575883587. The cubic root of 20121124 is about 271.9886276964.

Adding to 20121124 its reverse (42112102), we get a palindrome (62233226).

It can be divided in two parts, 2012 and 1124, that added together give a square (3136 = 56²).

The spelling of 20121124 in words is "twenty million, one hundred twenty-one thousand, one hundred twenty-four".