221010101220111 has 16 divisors (see below), whose sum is σ = 351419788276224. Its totient is φ = 120800552219424.

The previous prime is 221010101220109. The next prime is 221010101220113. The reversal of 221010101220111 is 111022101010122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221010101220109) and next prime (221010101220113).

It is not a de Polignac number, because 221010101220111 - 2¹ = 221010101220109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010101220113) 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, 228788924176 + ... + 228788925141.

It is an arithmetic number, because the mean of its divisors is an integer number (21963736767264).

Almost surely, 2^{221010101220111} is an apocalyptic number.

221010101220111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221010101220111 is a deficient number, since it is larger than the sum of its proper divisors (130409687056113).

221010101220111 is a wasteful number, since it uses less digits than its factorization.

221010101220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457577849350.

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

Adding to 221010101220111 its reverse (111022101010122), we get a palindrome (332032202230233).

The spelling of 221010101220111 in words is "two hundred twenty-one trillion, ten billion, one hundred one million, two hundred twenty thousand, one hundred eleven".