121100101 has 4 divisors (see below), whose sum is σ = 124053804. Its totient is φ = 118146400.

The previous prime is 121100093. The next prime is 121100107. The reversal of 121100101 is 101001121.

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 44957025 + 76143076 = 6705^2 + 8726^2 .

It is a cyclic number.

It is not a de Polignac number, because 121100101 - 2³ = 121100093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100107) 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 3 ways as a sum of consecutive naturals, for example, 1476790 + ... + 1476871.

It is an arithmetic number, because the mean of its divisors is an integer number (31013451).

Almost surely, 2^121100101 is an apocalyptic number.

It is an amenable number.

121100101 is a deficient number, since it is larger than the sum of its proper divisors (2953703).

121100101 is an equidigital number, since it uses as much as digits as its factorization.

121100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953702.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 121100101 is about 11004.5491048021. The cubic root of 121100101 is about 494.7451002011.

Adding to 121100101 its reverse (101001121), we get a palindrome (222101222).

The spelling of 121100101 in words is "one hundred twenty-one million, one hundred thousand, one hundred one".