100111000001020 has 24 divisors (see below), whose sum is σ = 210235437867168. Its totient is φ = 40043954692800.

The previous prime is 100111000000997. The next prime is 100111000001021. The reversal of 100111000001020 is 20100000111001.

It is a junction number, because it is equal to n+sod(n) for n = 100111000000994 and 100111000001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111000001021) 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, 25985271 + ... + 29588110.

It is an arithmetic number, because the mean of its divisors is an integer number (8759809911132).

Almost surely, 2^{100111000001020} is an apocalyptic number.

100111000001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100111000001020 is an abundant number, since it is smaller than the sum of its proper divisors (110124437866148).

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

100111000001020 is a wasteful number, since it uses less digits than its factorization.

100111000001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55663461 (or 55663459 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 100111000001020 its reverse (20100000111001), we get a palindrome (120211000112021).

The spelling of 100111000001020 in words is "one hundred trillion, one hundred eleven billion, one thousand, twenty".