121443101 has 4 divisors (see below), whose sum is σ = 130784892. Its totient is φ = 112101312.

The previous prime is 121443073. The next prime is 121443103. The reversal of 121443101 is 101344121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101344121 = 1553 ⋅65257.

It can be written as a sum of positive squares in 2 ways, for example, as 28783225 + 92659876 = 5365^2 + 9626^2 .

It is a cyclic number.

It is not a de Polignac number, because 121443101 - 2¹⁴ = 121426717 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 121443101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121443103) 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, 4670876 + ... + 4670901.

It is an arithmetic number, because the mean of its divisors is an integer number (32696223).

Almost surely, 2^121443101 is an apocalyptic number.

It is an amenable number.

121443101 is a deficient number, since it is larger than the sum of its proper divisors (9341791).

121443101 is an equidigital number, since it uses as much as digits as its factorization.

121443101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9341790.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 121443101 is about 11020.1225492278. The cubic root of 121443101 is about 495.2117598881.

Adding to 121443101 its reverse (101344121), we get a palindrome (222787222).

The spelling of 121443101 in words is "one hundred twenty-one million, four hundred forty-three thousand, one hundred one".