221122220101 has 4 divisors (see below), whose sum is σ = 224870054400. Its totient is φ = 217374385804.

The previous prime is 221122220057. The next prime is 221122220107. The reversal of 221122220101 is 101022221122.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 101022221122 = 2 ⋅50511110561.

It is a cyclic number.

It is not a de Polignac number, because 221122220101 - 2²⁷ = 220988002373 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 (221122220107) 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, 1873917061 + ... + 1873917178.

It is an arithmetic number, because the mean of its divisors is an integer number (56217513600).

Almost surely, 2^221122220101 is an apocalyptic number.

It is an amenable number.

221122220101 is a deficient number, since it is larger than the sum of its proper divisors (3747834299).

221122220101 is an equidigital number, since it uses as much as digits as its factorization.

221122220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3747834298.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221122220101 its reverse (101022221122), we get a palindrome (322144441223).

The spelling of 221122220101 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, one hundred one".