12021111211001 has 4 divisors (see below), whose sum is σ = 12039297461604. Its totient is φ = 12002924960400.

The previous prime is 12021111210947. The next prime is 12021111211009. The reversal of 12021111211001 is 10011211112021.

12021111211001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5042611571776 + 6978499639225 = 2245576^2 + 2641685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021111211001 is a prime.

It is a super-2 number, since 2×12021111211001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021111211009) 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, 9093124310 + ... + 9093125631.

It is an arithmetic number, because the mean of its divisors is an integer number (3009824365401).

Almost surely, 2^{12021111211001} is an apocalyptic number.

It is an amenable number.

12021111211001 is a deficient number, since it is larger than the sum of its proper divisors (18186250603).

12021111211001 is an equidigital number, since it uses as much as digits as its factorization.

12021111211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18186250602.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12021111211001 its reverse (10011211112021), we get a palindrome (22032322323022).

The spelling of 12021111211001 in words is "twelve trillion, twenty-one billion, one hundred eleven million, two hundred eleven thousand, one".