122521218 has 16 divisors (see below), whose sum is σ = 246973440. Its totient is φ = 40518576.

The previous prime is 122521187. The next prime is 122521219. The reversal of 122521218 is 812125221.

It is a super-2 number, since 2×122521218² = 30022897720407048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122521219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79633 + ... + 81156.

It is an arithmetic number, because the mean of its divisors is an integer number (15435840).

Almost surely, 2^122521218 is an apocalyptic number.

122521218 is an abundant number, since it is smaller than the sum of its proper divisors (124452222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122521218 is a wasteful number, since it uses less digits than its factorization.

122521218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160921.

The product of its digits is 640, while the sum is 24.

The square root of 122521218 is about 11068.9303006207. The cubic root of 122521218 is about 496.6728668105.

Adding to 122521218 its reverse (812125221), we get a palindrome (934646439).

The spelling of 122521218 in words is "one hundred twenty-two million, five hundred twenty-one thousand, two hundred eighteen".