12121000001 has 8 divisors (see below), whose sum is σ = 13353830208. Its totient is φ = 10909990000.

The previous prime is 12120999997. The next prime is 12121000007. The reversal of 12121000001 is 10000012121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12121000001 - 2² = 12120999997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121000007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5453885 + ... + 5456106.

It is an arithmetic number, because the mean of its divisors is an integer number (1669228776).

Almost surely, 2^12121000001 is an apocalyptic number.

12121000001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12121000001 is a deficient number, since it is larger than the sum of its proper divisors (1232830207).

12121000001 is a wasteful number, since it uses less digits than its factorization.

12121000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10910103.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 12121000001 its reverse (10000012121), we get a palindrome (22121012122).

The spelling of 12121000001 in words is "twelve billion, one hundred twenty-one million, one", and thus it is an aban number.