122222021 has 4 divisors (see below), whose sum is σ = 122760672. Its totient is φ = 121683372.

The previous prime is 122222017. The next prime is 122222053. The reversal of 122222021 is 120222221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120222221 = 7 ⋅17174603.

It is a cyclic number.

It is not a de Polignac number, because 122222021 - 2² = 122222017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122221987 and 122222005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222071) 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, 268985 + ... + 269438.

It is an arithmetic number, because the mean of its divisors is an integer number (30690168).

Almost surely, 2^122222021 is an apocalyptic number.

It is an amenable number.

122222021 is a deficient number, since it is larger than the sum of its proper divisors (538651).

122222021 is an equidigital number, since it uses as much as digits as its factorization.

122222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538650.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 122222021 is about 11055.4068672302. The cubic root of 122222021 is about 496.2682453050.

Adding to 122222021 its reverse (120222221), we get a palindrome (242444242).

The spelling of 122222021 in words is "one hundred twenty-two million, two hundred twenty-two thousand, twenty-one".