12111001202021 has 4 divisors (see below), whose sum is σ = 12823413037452. Its totient is φ = 11398589366592.

The previous prime is 12111001202017. The next prime is 12111001202023. The reversal of 12111001202021 is 12020210011121.

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 8349383620900 + 3761617581121 = 2889530^2 + 1939489^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111001202021 - 2² = 12111001202017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12111001201987 and 12111001202005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111001202023) 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, 356205917690 + ... + 356205917723.

It is an arithmetic number, because the mean of its divisors is an integer number (3205853259363).

Almost surely, 2^{12111001202021} is an apocalyptic number.

It is an amenable number.

12111001202021 is a deficient number, since it is larger than the sum of its proper divisors (712411835431).

12111001202021 is an equidigital number, since it uses as much as digits as its factorization.

12111001202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712411835430.

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

Adding to 12111001202021 its reverse (12020210011121), we get a palindrome (24131211213142).

The spelling of 12111001202021 in words is "twelve trillion, one hundred eleven billion, one million, two hundred two thousand, twenty-one".