121641101 has 4 divisors (see below), whose sum is σ = 121679100. Its totient is φ = 121603104.

The previous prime is 121641083. The next prime is 121641127. The reversal of 121641101 is 101146121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38812900 + 82828201 = 6230^2 + 9101^2 .

It is a cyclic number.

It is not a de Polignac number, because 121641101 - 2²⁶ = 54532237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121641101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121641601) 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, 13706 + ... + 20763.

It is an arithmetic number, because the mean of its divisors is an integer number (30419775).

Almost surely, 2^121641101 is an apocalyptic number.

It is an amenable number.

121641101 is a deficient number, since it is larger than the sum of its proper divisors (37999).

121641101 is an equidigital number, since it uses as much as digits as its factorization.

121641101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37998.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 121641101 is about 11029.1024566825. The cubic root of 121641101 is about 495.4807437116.

Adding to 121641101 its reverse (101146121), we get a palindrome (222787222).

The spelling of 121641101 in words is "one hundred twenty-one million, six hundred forty-one thousand, one hundred one".