12111221020001 has 4 divisors (see below), whose sum is σ = 12133362192432. Its totient is φ = 12089079847572.

The previous prime is 12111221019973. The next prime is 12111221020007. The reversal of 12111221020001 is 10002012211121.

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 a de Polignac number, because none of the positive numbers 2^k-12111221020001 is a prime.

It is a super-3 number, since 3×12111221020001³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111221020007) 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, 11070585395 + ... + 11070586488.

It is an arithmetic number, because the mean of its divisors is an integer number (3033340548108).

Almost surely, 2^{12111221020001} is an apocalyptic number.

It is an amenable number.

12111221020001 is a deficient number, since it is larger than the sum of its proper divisors (22141172431).

12111221020001 is an equidigital number, since it uses as much as digits as its factorization.

12111221020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22141172430.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12111221020001 its reverse (10002012211121), we get a palindrome (22113233231122).

The spelling of 12111221020001 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, twenty thousand, one".