121320001 has 4 divisors (see below), whose sum is σ = 132349104. Its totient is φ = 110290900.

The previous prime is 121319999. The next prime is 121320011. The reversal of 121320001 is 100023121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121320001 - 2¹ = 121319999 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 121320001.

It is not an unprimeable number, because it can be changed into a prime (121320011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5514535 + ... + 5514556.

It is an arithmetic number, because the mean of its divisors is an integer number (33087276).

Almost surely, 2^121320001 is an apocalyptic number.

121320001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121320001 is a deficient number, since it is larger than the sum of its proper divisors (11029103).

121320001 is a wasteful number, since it uses less digits than its factorization.

121320001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11029102.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 121320001 is about 11014.5358958061. The cubic root of 121320001 is about 495.0443806074.

Adding to 121320001 its reverse (100023121), we get a palindrome (221343122).

The spelling of 121320001 in words is "one hundred twenty-one million, three hundred twenty thousand, one".