221122221101 has 4 divisors (see below), whose sum is σ = 221149291104. Its totient is φ = 221095151100.

The previous prime is 221122221091. The next prime is 221122221113. The reversal of 221122221101 is 101122221122.

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.

It is a cyclic number.

It is not a de Polignac number, because 221122221101 - 2²⁶ = 221055112237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221122221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122221401) 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, 13522745 + ... + 13539086.

It is an arithmetic number, because the mean of its divisors is an integer number (55287322776).

Almost surely, 2^221122221101 is an apocalyptic number.

It is an amenable number.

221122221101 is a deficient number, since it is larger than the sum of its proper divisors (27070003).

221122221101 is an equidigital number, since it uses as much as digits as its factorization.

221122221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27070002.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221122221101 its reverse (101122221122), we get a palindrome (322244442223).

The spelling of 221122221101 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred one".