1220221110012 has 12 divisors (see below), whose sum is σ = 2847182590056. Its totient is φ = 406740370000.

The previous prime is 1220221109981. The next prime is 1220221110013. The reversal of 1220221110012 is 2100111220221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1220221109973 and 1220221110000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220221110013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50842546239 + ... + 50842546262.

It is an arithmetic number, because the mean of its divisors is an integer number (237265215838).

Almost surely, 2^{1220221110012} is an apocalyptic number.

1220221110012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220221110012 is an abundant number, since it is smaller than the sum of its proper divisors (1626961480044).

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

1220221110012 is a wasteful number, since it uses less digits than its factorization.

1220221110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101685092508 (or 101685092506 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220221110012 its reverse (2100111220221), we get a palindrome (3320332330233).

The spelling of 1220221110012 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, one hundred ten thousand, twelve".