1220303102100 has 72 divisors (see below), whose sum is σ = 3533109804000. Its totient is φ = 325196081280.

The previous prime is 1220303102059. The next prime is 1220303102119. The reversal of 1220303102100 is 12013030221.

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 1220303102100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 914350 + ... + 1810149.

It is an arithmetic number, because the mean of its divisors is an integer number (49070969500).

Almost surely, 2^{1220303102100} is an apocalyptic number.

1220303102100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220303102100 is an abundant number, since it is smaller than the sum of its proper divisors (2312806701900).

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

1220303102100 is a wasteful number, since it uses less digits than its factorization.

1220303102100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726009 (or 2726002 counting only the distinct ones).

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

Adding to 1220303102100 its reverse (12013030221), we get a palindrome (1232316132321).

The spelling of 1220303102100 in words is "one trillion, two hundred twenty billion, three hundred three million, one hundred two thousand, one hundred".