121201121 has 8 divisors (see below), whose sum is σ = 125506920. Its totient is φ = 116903808.

The previous prime is 121201117. The next prime is 121201127. The reversal of 121201121 is 121102121.

It can be written as a sum of positive squares in 4 ways, for example, as 34058896 + 87142225 = 5836^2 + 9335^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121201121 - 2² = 121201117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121201127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45005 + ... + 47621.

It is an arithmetic number, because the mean of its divisors is an integer number (15688365).

Almost surely, 2^121201121 is an apocalyptic number.

It is an amenable number.

121201121 is a deficient number, since it is larger than the sum of its proper divisors (4305799).

121201121 is a wasteful number, since it uses less digits than its factorization.

121201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 121201121 is about 11009.1380679870. The cubic root of 121201121 is about 494.8826317659.

Adding to 121201121 its reverse (121102121), we get a palindrome (242303242).

The spelling of 121201121 in words is "one hundred twenty-one million, two hundred one thousand, one hundred twenty-one".