122021220211 has 4 divisors (see below), whose sum is σ = 133114058424. Its totient is φ = 110928382000.

The previous prime is 122021220179. The next prime is 122021220221. The reversal of 122021220211 is 112022120221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 122021220211 - 2⁵ = 122021220179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122021220221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5546419090 + ... + 5546419111.

It is an arithmetic number, because the mean of its divisors is an integer number (33278514606).

Almost surely, 2^122021220211 is an apocalyptic number.

122021220211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122021220211 is a deficient number, since it is larger than the sum of its proper divisors (11092838213).

122021220211 is a wasteful number, since it uses less digits than its factorization.

122021220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11092838212.

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

Adding to 122021220211 its reverse (112022120221), we get a palindrome (234043340432).

The spelling of 122021220211 in words is "one hundred twenty-two billion, twenty-one million, two hundred twenty thousand, two hundred eleven".