12221021010111 has 4 divisors (see below), whose sum is σ = 16294694680152. Its totient is φ = 8147347340072.

The previous prime is 12221021010083. The next prime is 12221021010221. The reversal of 12221021010111 is 11101012012221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12221021010111 - 2⁶ = 12221021010047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221021010311) 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, 2036836835016 + ... + 2036836835021.

It is an arithmetic number, because the mean of its divisors is an integer number (4073673670038).

Almost surely, 2^{12221021010111} is an apocalyptic number.

12221021010111 is a deficient number, since it is larger than the sum of its proper divisors (4073673670041).

12221021010111 is an equidigital number, since it uses as much as digits as its factorization.

12221021010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073673670040.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12221021010111 its reverse (11101012012221), we get a palindrome (23322033022332).

The spelling of 12221021010111 in words is "twelve trillion, two hundred twenty-one billion, twenty-one million, ten thousand, one hundred eleven".