122221577 has 4 divisors (see below), whose sum is σ = 122258640. Its totient is φ = 122184516.

The previous prime is 122221549. The next prime is 122221579. The reversal of 122221577 is 775122221.

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: 775122221 = 1319 ⋅587659.

It is a cyclic number.

It is not a de Polignac number, because 122221577 - 2⁶ = 122221513 is a prime.

It is a super-2 number, since 2×122221577² = 29876227768733858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122221579) 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, 13043 + ... + 20360.

It is an arithmetic number, because the mean of its divisors is an integer number (30564660).

Almost surely, 2^122221577 is an apocalyptic number.

It is an amenable number.

122221577 is a deficient number, since it is larger than the sum of its proper divisors (37063).

122221577 is an equidigital number, since it uses as much as digits as its factorization.

122221577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37062.

The product of its digits is 3920, while the sum is 29.

The square root of 122221577 is about 11055.3867865399. The cubic root of 122221577 is about 496.2676443675.

Adding to 122221577 its reverse (775122221), we get a palindrome (897343798).

The spelling of 122221577 in words is "one hundred twenty-two million, two hundred twenty-one thousand, five hundred seventy-seven".