121001121 has 36 divisors (see below), whose sum is σ = 192653552. Its totient is φ = 75878208.

The previous prime is 121001113. The next prime is 121001141. The reversal of 121001121 is 121100121.

It is a happy number.

It is not a de Polignac number, because 121001121 - 2³ = 121001113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001141) 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 35 ways as a sum of consecutive naturals, for example, 69366 + ... + 71088.

Almost surely, 2^121001121 is an apocalyptic number.

It is an amenable number.

121001121 is a deficient number, since it is larger than the sum of its proper divisors (71652431).

121001121 is an equidigital number, since it uses as much as digits as its factorization.

121001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772 (or 1743 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 121001121 is about 11000.0509544274. The cubic root of 121001121 is about 494.6102717483.

Adding to 121001121 its reverse (121100121), we get a palindrome (242101242).

The spelling of 121001121 in words is "one hundred twenty-one million, one thousand, one hundred twenty-one".