221200001122120 has 16 divisors (see below), whose sum is σ = 497700002524860. Its totient is φ = 88480000448832.

The previous prime is 221200001122103. The next prime is 221200001122157. The reversal of 221200001122120 is 21221100002122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 220976727861796 + 223273260324 = 14865286^2 + 472518^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221200001122094 and 221200001122103.

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, 2765000013987 + ... + 2765000014066.

Almost surely, 2^{221200001122120} is an apocalyptic number.

221200001122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221200001122120 is an abundant number, since it is smaller than the sum of its proper divisors (276500001402740).

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

221200001122120 is a wasteful number, since it uses less digits than its factorization.

221200001122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5530000028064 (or 5530000028060 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221200001122120 its reverse (21221100002122), we get a palindrome (242421101124242).

The spelling of 221200001122120 in words is "two hundred twenty-one trillion, two hundred billion, one million, one hundred twenty-two thousand, one hundred twenty".