221010120011111 has 32 divisors (see below), whose sum is σ = 233575504799616. Its totient is φ = 208704038400000.

The previous prime is 221010120011101. The next prime is 221010120011159. The reversal of 221010120011111 is 111110021010122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221010120011111 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 (221010120011101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1146120575 + ... + 1146313391.

It is an arithmetic number, because the mean of its divisors is an integer number (7299234524988).

Almost surely, 2^{221010120011111} is an apocalyptic number.

221010120011111 is a deficient number, since it is larger than the sum of its proper divisors (12565384788505).

221010120011111 is a wasteful number, since it uses less digits than its factorization.

221010120011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194363.

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

Adding to 221010120011111 its reverse (111110021010122), we get a palindrome (332120141021233).

The spelling of 221010120011111 in words is "two hundred twenty-one trillion, ten billion, one hundred twenty million, eleven thousand, one hundred eleven".