221111200212101 has 4 divisors (see below), whose sum is σ = 221111232011712. Its totient is φ = 221111168412492.

The previous prime is 221111200212073. The next prime is 221111200212103. The reversal of 221111200212101 is 101212002111122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 221111200212101 - 2²² = 221111196017797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221111200212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111200212103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494525 + ... + 21034898.

It is an arithmetic number, because the mean of its divisors is an integer number (55277808002928).

Almost surely, 2^{221111200212101} is an apocalyptic number.

It is an amenable number.

221111200212101 is a deficient number, since it is larger than the sum of its proper divisors (31799611).

221111200212101 is a wasteful number, since it uses less digits than its factorization.

221111200212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31799610.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221111200212101 its reverse (101212002111122), we get a palindrome (322323202323223).

The spelling of 221111200212101 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred million, two hundred twelve thousand, one hundred one".