122212261 has 4 divisors (see below), whose sum is σ = 126154624. Its totient is φ = 118269900.

The previous prime is 122212247. The next prime is 122212273. The reversal of 122212261 is 162212221.

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: 162212221 = 163 ⋅995167.

It is a cyclic number.

It is not a de Polignac number, because 122212261 - 2¹⁷ = 122081189 is a prime.

It is a super-3 number, since 3×122212261³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122213261) 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, 1971135 + ... + 1971196.

It is an arithmetic number, because the mean of its divisors is an integer number (31538656).

Almost surely, 2^122212261 is an apocalyptic number.

It is an amenable number.

122212261 is a deficient number, since it is larger than the sum of its proper divisors (3942363).

122212261 is an equidigital number, since it uses as much as digits as its factorization.

122212261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942362.

The product of its digits is 192, while the sum is 19.

The square root of 122212261 is about 11054.9654454458. The cubic root of 122212261 is about 496.2550351732.

Adding to 122212261 its reverse (162212221), we get a palindrome (284424482).

The spelling of 122212261 in words is "one hundred twenty-two million, two hundred twelve thousand, two hundred sixty-one".