122122022021 has 4 divisors (see below), whose sum is σ = 124124022444. Its totient is φ = 120120021600.

The previous prime is 122122021999. The next prime is 122122022027. The reversal of 122122022021 is 120220221221.

It is a happy number.

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 26508724225 + 95613297796 = 162815^2 + 309214^2 .

It is a cyclic number.

It is not a de Polignac number, because 122122022021 - 2¹⁰ = 122122020997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122022027) 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, 1001000120 + ... + 1001000241.

It is an arithmetic number, because the mean of its divisors is an integer number (31031005611).

Almost surely, 2^122122022021 is an apocalyptic number.

It is an amenable number.

122122022021 is a deficient number, since it is larger than the sum of its proper divisors (2002000423).

122122022021 is an equidigital number, since it uses as much as digits as its factorization.

122122022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002000422.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 122122022021 its reverse (120220221221), we get a palindrome (242342243242).

The spelling of 122122022021 in words is "one hundred twenty-two billion, one hundred twenty-two million, twenty-two thousand, twenty-one".