1223103020100 has 288 divisors, whose sum is σ = 3868456402944. Its totient is φ = 296545804800.

The previous prime is 1223103020089. The next prime is 1223103020101. The reversal of 1223103020100 is 10203013221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1223103020100.

It is not an unprimeable number, because it can be changed into a prime (1223103020101) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 504787489 + ... + 504789911.

It is an arithmetic number, because the mean of its divisors is an integer number (13432140288).

Almost surely, 2^{1223103020100} is an apocalyptic number.

1223103020100 is a gapful number since it is divisible by the number (10) 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 1223103020100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1934228201472).

1223103020100 is an abundant number, since it is smaller than the sum of its proper divisors (2645353382844).

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

1223103020100 is a wasteful number, since it uses less digits than its factorization.

1223103020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347 (or 4340 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1223103020100 its reverse (10203013221), we get a palindrome (1233306033321).

The spelling of 1223103020100 in words is "one trillion, two hundred twenty-three billion, one hundred three million, twenty thousand, one hundred".