12111212001 has 8 divisors (see below), whose sum is σ = 18455180224. Its totient is φ = 6920692560.

The previous prime is 12111211951. The next prime is 12111212093. The reversal of 12111212001 is 10021211121.

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

It is not a de Polignac number, because 12111212001 - 2¹¹ = 12111209953 is a prime.

It is a super-2 number, since 2×12111212001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111212101) 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, 288362170 + ... + 288362211.

It is an arithmetic number, because the mean of its divisors is an integer number (2306897528).

Almost surely, 2^12111212001 is an apocalyptic number.

It is an amenable number.

12111212001 is a deficient number, since it is larger than the sum of its proper divisors (6343968223).

12111212001 is an equidigital number, since it uses as much as digits as its factorization.

12111212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576724391.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12111212001 its reverse (10021211121), we get a palindrome (22132423122).

The spelling of 12111212001 in words is "twelve billion, one hundred eleven million, two hundred twelve thousand, one".