1220112100028 has 12 divisors (see below), whose sum is σ = 2187274130832. Its totient is φ = 595176634080.

The previous prime is 1220112100027. The next prime is 1220112100087. The reversal of 1220112100028 is 8200012110221.

It is a junction number, because it is equal to n+sod(n) for n = 1220112099982 and 1220112100009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220112100027) 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, 3719853800 + ... + 3719854127.

It is an arithmetic number, because the mean of its divisors is an integer number (182272844236).

Almost surely, 2^{1220112100028} is an apocalyptic number.

It is an amenable number.

1220112100028 is a deficient number, since it is larger than the sum of its proper divisors (967162030804).

1220112100028 is a wasteful number, since it uses less digits than its factorization.

1220112100028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7439707972 (or 7439707970 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 1220112100028 its reverse (8200012110221), we get a palindrome (9420124210249).

The spelling of 1220112100028 in words is "one trillion, two hundred twenty billion, one hundred twelve million, one hundred thousand, twenty-eight".