122011220221 has 4 divisors (see below), whose sum is σ = 133103149344. Its totient is φ = 110919291100.

The previous prime is 122011220189. The next prime is 122011220269. The reversal of 122011220221 is 122022110221.

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.

It is a cyclic number.

It is not a de Polignac number, because 122011220221 - 2⁵ = 122011220189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122011220195 and 122011220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122011220281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5545964545 + ... + 5545964566.

It is an arithmetic number, because the mean of its divisors is an integer number (33275787336).

Almost surely, 2^122011220221 is an apocalyptic number.

122011220221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122011220221 is a deficient number, since it is larger than the sum of its proper divisors (11091929123).

122011220221 is a wasteful number, since it uses less digits than its factorization.

122011220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11091929122.

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

Adding to 122011220221 its reverse (122022110221), we get a palindrome (244033330442).

Subtracting 122011220221 from its reverse (122022110221), we obtain a square (10890000 = 3300²).

The spelling of 122011220221 in words is "one hundred twenty-two billion, eleven million, two hundred twenty thousand, two hundred twenty-one".