12021121001 has 8 divisors (see below), whose sum is σ = 12655003200. Its totient is φ = 11387358000.

The previous prime is 12021120997. The next prime is 12021121019. The reversal of 12021121001 is 10012112021.

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 12021121001 - 2² = 12021120997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021121501) 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, 239876 + ... + 285626.

It is an arithmetic number, because the mean of its divisors is an integer number (1581875400).

Almost surely, 2^12021121001 is an apocalyptic number.

It is an amenable number.

12021121001 is a deficient number, since it is larger than the sum of its proper divisors (633882199).

12021121001 is a wasteful number, since it uses less digits than its factorization.

12021121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59599.

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

Adding to 12021121001 its reverse (10012112021), we get a palindrome (22033233022).

The spelling of 12021121001 in words is "twelve billion, twenty-one million, one hundred twenty-one thousand, one".