1000100011220 has 24 divisors (see below), whose sum is σ = 2100303744000. Its totient is φ = 400022152992.

The previous prime is 1000100011187. The next prime is 1000100011223. The reversal of 1000100011220 is 221100010001.

It is a junction number, because it is equal to n+sod(n) for n = 1000100011198 and 1000100011207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000100011223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 651620 + ... + 1557179.

It is an arithmetic number, because the mean of its divisors is an integer number (87512656000).

Almost surely, 2^{1000100011220} is an apocalyptic number.

1000100011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000100011220 is an abundant number, since it is smaller than the sum of its proper divisors (1100203732780).

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

1000100011220 is a wasteful number, since it uses less digits than its factorization.

1000100011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231447 (or 2231445 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1000100011220 its reverse (221100010001), we get a palindrome (1221200021221).

The spelling of 1000100011220 in words is "one trillion, one hundred million, eleven thousand, two hundred twenty".