1100223021012 has 144 divisors (see below), whose sum is σ = 2792072626560. Its totient is φ = 336027654144.

The previous prime is 1100223020999. The next prime is 1100223021013. The reversal of 1100223021012 is 2101203220011.

It is a junction number, because it is equal to n+sod(n) for n = 1100223020982 and 1100223021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100223021013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118057689 + ... + 118067007.

It is an arithmetic number, because the mean of its divisors is an integer number (19389393240).

Almost surely, 2^{1100223021012} is an apocalyptic number.

1100223021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1100223021012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1396036313280).

1100223021012 is an abundant number, since it is smaller than the sum of its proper divisors (1691849605548).

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

1100223021012 is a wasteful number, since it uses less digits than its factorization.

1100223021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9742 (or 9697 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1100223021012 its reverse (2101203220011), we get a palindrome (3201426241023).

The spelling of 1100223021012 in words is "one trillion, one hundred billion, two hundred twenty-three million, twenty-one thousand, twelve".