122217228 has 96 divisors (see below), whose sum is σ = 371051520. Its totient is φ = 34058880.

The previous prime is 122217149. The next prime is 122217259. The reversal of 122217228 is 822712221.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29025 + ... + 32967.

It is an arithmetic number, because the mean of its divisors is an integer number (3865120).

Almost surely, 2^122217228 is an apocalyptic number.

122217228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122217228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185525760).

122217228 is an abundant number, since it is smaller than the sum of its proper divisors (248834292).

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

122217228 is a wasteful number, since it uses less digits than its factorization.

122217228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004 (or 3996 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 122217228 is about 11055.1900933453. The cubic root of 122217228 is about 496.2617580812.

Adding to 122217228 its reverse (822712221), we get a palindrome (944929449).

It can be divided in two parts, 12221 and 7228, that multiplied together give a palindrome (88333388).

The spelling of 122217228 in words is "one hundred twenty-two million, two hundred seventeen thousand, two hundred twenty-eight".