201122021112221 has 4 divisors (see below), whose sum is σ = 219405841213344. Its totient is φ = 182838201011100.

The previous prime is 201122021112149. The next prime is 201122021112269. The reversal of 201122021112221 is 122211120221102.

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 201122021112221 - 2¹⁰ = 201122021111197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201122021112193 and 201122021112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201122021112821) 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, 9141910050545 + ... + 9141910050566.

It is an arithmetic number, because the mean of its divisors is an integer number (54851460303336).

Almost surely, 2^{201122021112221} is an apocalyptic number.

It is an amenable number.

201122021112221 is a deficient number, since it is larger than the sum of its proper divisors (18283820101123).

201122021112221 is a wasteful number, since it uses less digits than its factorization.

201122021112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18283820101122.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 201122021112221 its reverse (122211120221102), we get a palindrome (323333141333323).

The spelling of 201122021112221 in words is "two hundred one trillion, one hundred twenty-two billion, twenty-one million, one hundred twelve thousand, two hundred twenty-one".