221122020101 has 4 divisors (see below), whose sum is σ = 234129197772. Its totient is φ = 208114842432.

The previous prime is 221122020071. The next prime is 221122020103. The reversal of 221122020101 is 101020221122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89081356225 + 132040663876 = 298465^2 + 363374^2 .

It is a cyclic number.

It is not a de Polignac number, because 221122020101 - 2¹⁰ = 221122019077 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 (221122020103) 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, 6503588810 + ... + 6503588843.

It is an arithmetic number, because the mean of its divisors is an integer number (58532299443).

Almost surely, 2^221122020101 is an apocalyptic number.

It is an amenable number.

221122020101 is a deficient number, since it is larger than the sum of its proper divisors (13007177671).

221122020101 is a wasteful number, since it uses less digits than its factorization.

221122020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13007177670.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221122020101 its reverse (101020221122), we get a palindrome (322142241223).

The spelling of 221122020101 in words is "two hundred twenty-one billion, one hundred twenty-two million, twenty thousand, one hundred one".