221111110100104 has 48 divisors (see below), whose sum is σ = 482592135330000. Its totient is φ = 94698687329568.

The previous prime is 221111110100081. The next prime is 221111110100107. The reversal of 221111110100104 is 401001011111122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221111110100107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187557474 + ... + 188732689.

It is an arithmetic number, because the mean of its divisors is an integer number (10054002819375).

Almost surely, 2^{221111110100104} is an apocalyptic number.

It is an amenable number.

221111110100104 is an abundant number, since it is smaller than the sum of its proper divisors (261481025229896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221111110100104 is a wasteful number, since it uses less digits than its factorization.

221111110100104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376291682 (or 376291671 counting only the distinct ones).

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

Adding to 221111110100104 its reverse (401001011111122), we get a palindrome (622112121211226).

The spelling of 221111110100104 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred ten million, one hundred thousand, one hundred four".