221100100111002 has 32 divisors (see below), whose sum is σ = 522798266275200. Its totient is φ = 60993131064768.

The previous prime is 221100100110977. The next prime is 221100100111013. The reversal of 221100100111002 is 200111001001122.

It is a super-2 number, since 2×221100100111002² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90763586677 + ... + 90763589112.

It is an arithmetic number, because the mean of its divisors is an integer number (16337445821100).

Almost surely, 2^{221100100111002} is an apocalyptic number.

221100100111002 is an abundant number, since it is smaller than the sum of its proper divisors (301698166164198).

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

221100100111002 is a wasteful number, since it uses less digits than its factorization.

221100100111002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181527175830.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221100100111002 its reverse (200111001001122), we get a palindrome (421211101112124).

The spelling of 221100100111002 in words is "two hundred twenty-one trillion, one hundred billion, one hundred million, one hundred eleven thousand, two".