221001120012111 has 16 divisors (see below), whose sum is σ = 295671842638848. Its totient is φ = 146832418815200.

The previous prime is 221001120012107. The next prime is 221001120012161. The reversal of 221001120012111 is 111210021100122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221001120012111 - 2² = 221001120012107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001120012161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17603511 + ... + 27420536.

It is an arithmetic number, because the mean of its divisors is an integer number (18479490164928).

Almost surely, 2^{221001120012111} is an apocalyptic number.

221001120012111 is a deficient number, since it is larger than the sum of its proper divisors (74670722626737).

221001120012111 is a wasteful number, since it uses less digits than its factorization.

221001120012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45029622.

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

Adding to 221001120012111 its reverse (111210021100122), we get a palindrome (332211141112233).

The spelling of 221001120012111 in words is "two hundred twenty-one trillion, one billion, one hundred twenty million, twelve thousand, one hundred eleven".