1220012122100 has 18 divisors (see below), whose sum is σ = 2647426305174. Its totient is φ = 488004848800.

The previous prime is 1220012122081. The next prime is 1220012122111. The reversal of 1220012122100 is 12212100221.

It can be written as a sum of positive squares in 3 ways, for example, as 224064009316 + 995948112784 = 473354^2 + 997972^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6100060511 + ... + 6100060710.

Almost surely, 2^{1220012122100} is an apocalyptic number.

1220012122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220012122100 is an abundant number, since it is smaller than the sum of its proper divisors (1427414183074).

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

1220012122100 is a wasteful number, since it uses less digits than its factorization.

1220012122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12200121235 (or 12200121228 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1220012122100 its reverse (12212100221), we get a palindrome (1232224222321).

It can be divided in two parts, 12200121 and 22100, that added together give a palindrome (12222221).

The spelling of 1220012122100 in words is "one trillion, two hundred twenty billion, twelve million, one hundred twenty-two thousand, one hundred".