122557001220 has 72 divisors (see below), whose sum is σ = 372060876096. Its totient is φ = 32655085632.

The previous prime is 122557001201. The next prime is 122557001251. The reversal of 122557001220 is 22100755221.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58222 + ... + 498501.

It is an arithmetic number, because the mean of its divisors is an integer number (5167512168).

Almost surely, 2^122557001220 is an apocalyptic number.

122557001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122557001220 is an abundant number, since it is smaller than the sum of its proper divisors (249503874876).

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

122557001220 is a wasteful number, since it uses less digits than its factorization.

122557001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557961 (or 557956 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

Adding to 122557001220 its reverse (22100755221), we get a palindrome (144657756441).

The spelling of 122557001220 in words is "one hundred twenty-two billion, five hundred fifty-seven million, one thousand, two hundred twenty".