221002100101111 has 12 divisors (see below), whose sum is σ = 258430065563520. Its totient is φ = 188438589457440.

The previous prime is 221002100101051. The next prime is 221002100101163. The reversal of 221002100101111 is 111101001200122.

It is a happy number.

It is not a de Polignac number, because 221002100101111 - 2²¹ = 221002098003959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221002100101091 and 221002100101100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002104101111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11806919806 + ... + 11806938523.

It is an arithmetic number, because the mean of its divisors is an integer number (21535838796960).

Almost surely, 2^{221002100101111} is an apocalyptic number.

221002100101111 is a deficient number, since it is larger than the sum of its proper divisors (37427965462409).

221002100101111 is a wasteful number, since it uses less digits than its factorization.

221002100101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23613858534 (or 23613858527 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221002100101111 its reverse (111101001200122), we get a palindrome (332103101301233).

The spelling of 221002100101111 in words is "two hundred twenty-one trillion, two billion, one hundred million, one hundred one thousand, one hundred eleven".