122220520 has 16 divisors (see below), whose sum is σ = 274996260. Its totient is φ = 48888192.

The previous prime is 122220517. The next prime is 122220541. The reversal of 122220520 is 25022221.

It can be written as a sum of positive squares in 2 ways, for example, as 110124036 + 12096484 = 10494^2 + 3478^2 .

It is a junction number, because it is equal to n+sod(n) for n = 122220494 and 122220503.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1527717 + ... + 1527796.

Almost surely, 2^122220520 is an apocalyptic number.

122220520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122220520 is an abundant number, since it is smaller than the sum of its proper divisors (152775740).

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

122220520 is a wasteful number, since it uses less digits than its factorization.

122220520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055524 (or 3055520 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 122220520 is about 11055.3389816866. The cubic root of 122220520 is about 496.2662137516.

Adding to 122220520 its reverse (25022221), we get a palindrome (147242741).

The spelling of 122220520 in words is "one hundred twenty-two million, two hundred twenty thousand, five hundred twenty".