1111223456780 has 24 divisors (see below), whose sum is σ = 2371824495600. Its totient is φ = 437202671040.

The previous prime is 1111223456771. The next prime is 1111223456807. The reversal of 1111223456780 is 876543221111.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455418230 + ... + 455420669.

It is an arithmetic number, because the mean of its divisors is an integer number (98826020650).

Almost surely, 2^{1111223456780} is an apocalyptic number.

1111223456780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111223456780 is an abundant number, since it is smaller than the sum of its proper divisors (1260601038820).

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

1111223456780 is a wasteful number, since it uses less digits than its factorization.

1111223456780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910838969 (or 910838967 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

Adding to 1111223456780 its reverse (876543221111), we get a palindrome (1987766677891).

The spelling of 1111223456780 in words is "one trillion, one hundred eleven billion, two hundred twenty-three million, four hundred fifty-six thousand, seven hundred eighty".