121641206 has 4 divisors (see below), whose sum is σ = 182461812. Its totient is φ = 60820602.

The previous prime is 121641199. The next prime is 121641209. The reversal of 121641206 is 602146121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 602146121 = 73 ⋅8248577.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121641209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30410300 + ... + 30410303.

It is an arithmetic number, because the mean of its divisors is an integer number (45615453).

Almost surely, 2^121641206 is an apocalyptic number.

121641206 is a deficient number, since it is larger than the sum of its proper divisors (60820606).

121641206 is an equidigital number, since it uses as much as digits as its factorization.

121641206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60820605.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 121641206 is about 11029.1072168150. The cubic root of 121641206 is about 495.4808862771.

Adding to 121641206 its reverse (602146121), we get a palindrome (723787327).

The spelling of 121641206 in words is "one hundred twenty-one million, six hundred forty-one thousand, two hundred six".