2111122100221 has 8 divisors (see below), whose sum is σ = 2158891709184. Its totient is φ = 2063646458640.

The previous prime is 2111122100209. The next prime is 2111122100231. The reversal of 2111122100221 is 1220012211112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111122100221 - 2⁵ = 2111122100189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111122100195 and 2111122100204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111122100231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73477321 + ... + 73506046.

It is an arithmetic number, because the mean of its divisors is an integer number (269861463648).

Almost surely, 2^{2111122100221} is an apocalyptic number.

It is an amenable number.

2111122100221 is a deficient number, since it is larger than the sum of its proper divisors (47769608963).

2111122100221 is a wasteful number, since it uses less digits than its factorization.

2111122100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146983691.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2111122100221 its reverse (1220012211112), we get a palindrome (3331134311333).

The spelling of 2111122100221 in words is "two trillion, one hundred eleven billion, one hundred twenty-two million, one hundred thousand, two hundred twenty-one".