221222204101 has 4 divisors (see below), whose sum is σ = 221223441600. Its totient is φ = 221220966604.

The previous prime is 221222204069. The next prime is 221222204107. The reversal of 221222204101 is 101402222122.

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 221222204101 - 2⁵ = 221222204069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222204107) 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, 293671 + ... + 727108.

It is an arithmetic number, because the mean of its divisors is an integer number (55305860400).

Almost surely, 2^221222204101 is an apocalyptic number.

It is an amenable number.

221222204101 is a deficient number, since it is larger than the sum of its proper divisors (1237499).

221222204101 is a wasteful number, since it uses less digits than its factorization.

221222204101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237498.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221222204101 its reverse (101402222122), we get a palindrome (322624426223).

The spelling of 221222204101 in words is "two hundred twenty-one billion, two hundred twenty-two million, two hundred four thousand, one hundred one".