1201124121 has 16 divisors (see below), whose sum is σ = 1700715840. Its totient is φ = 751887360.

The previous prime is 1201124077. The next prime is 1201124129. The reversal of 1201124121 is 1214211021.

It is not a de Polignac number, because 1201124121 - 2¹⁰ = 1201123097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201124121.

It is not an unprimeable number, because it can be changed into a prime (1201124129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86800 + ... + 99681.

It is an arithmetic number, because the mean of its divisors is an integer number (106294740).

Almost surely, 2^1201124121 is an apocalyptic number.

It is an amenable number.

1201124121 is a deficient number, since it is larger than the sum of its proper divisors (499591719).

1201124121 is a wasteful number, since it uses less digits than its factorization.

1201124121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186616.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1201124121 is about 34657.2376423742. The cubic root of 1201124121 is about 1062.9902869604.

Adding to 1201124121 its reverse (1214211021), we get a palindrome (2415335142).

The spelling of 1201124121 in words is "one billion, two hundred one million, one hundred twenty-four thousand, one hundred twenty-one".