12121120001 has 4 divisors (see below), whose sum is σ = 12512123904. Its totient is φ = 11730116100.

The previous prime is 12121119953. The next prime is 12121120009. The reversal of 12121120001 is 10002112121.

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 12121120001 - 2²² = 12116925697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12121120009) 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, 195501905 + ... + 195501966.

It is an arithmetic number, because the mean of its divisors is an integer number (3128030976).

Almost surely, 2^12121120001 is an apocalyptic number.

It is an amenable number.

12121120001 is a deficient number, since it is larger than the sum of its proper divisors (391003903).

12121120001 is an equidigital number, since it uses as much as digits as its factorization.

12121120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391003902.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12121120001 its reverse (10002112121), we get a palindrome (22123232122).

The spelling of 12121120001 in words is "twelve billion, one hundred twenty-one million, one hundred twenty thousand, one".