122212221021 has 96 divisors (see below), whose sum is σ = 212708321280. Its totient is φ = 66743740800.

The previous prime is 122212220989. The next prime is 122212221049. The reversal of 122212221021 is 120122212221.

It is a happy number.

It is not a de Polignac number, because 122212221021 - 2⁵ = 122212220989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122212220985 and 122212221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122212221721) 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 95 ways as a sum of consecutive naturals, for example, 7822800 + ... + 7838406.

It is an arithmetic number, because the mean of its divisors is an integer number (2215711680).

Almost surely, 2^122212221021 is an apocalyptic number.

122212221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122212221021 is a deficient number, since it is larger than the sum of its proper divisors (90496100259).

122212221021 is a wasteful number, since it uses less digits than its factorization.

122212221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15847 (or 15844 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 122212221021 its reverse (120122212221), we get a palindrome (242334433242).

The spelling of 122212221021 in words is "one hundred twenty-two billion, two hundred twelve million, two hundred twenty-one thousand, twenty-one".