12111022022021 has 8 divisors (see below), whose sum is σ = 13042972124280. Its totient is φ = 11179119494592.

The previous prime is 12111022022017. The next prime is 12111022022083. The reversal of 12111022022021 is 12022022011121.

It can be written as a sum of positive squares in 4 ways, for example, as 480125653921 + 11630896368100 = 692911^2 + 3410410^2 .

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 12111022022021 - 2² = 12111022022017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111022022821) 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, 11364110 + ... + 12384063.

It is an arithmetic number, because the mean of its divisors is an integer number (1630371515535).

Almost surely, 2^{12111022022021} is an apocalyptic number.

It is an amenable number.

12111022022021 is a deficient number, since it is larger than the sum of its proper divisors (931950102259).

12111022022021 is a wasteful number, since it uses less digits than its factorization.

12111022022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23787415.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12111022022021 its reverse (12022022011121), we get a palindrome (24133044033142).

The spelling of 12111022022021 in words is "twelve trillion, one hundred eleven billion, twenty-two million, twenty-two thousand, twenty-one".