102100001120020 has 12 divisors (see below), whose sum is σ = 214410002352084. Its totient is φ = 40840000448000.

The previous prime is 102100001120003. The next prime is 102100001120021. The reversal of 102100001120020 is 20021100001201.

It can be written as a sum of positive squares in 2 ways, for example, as 70366563156484 + 31733437963536 = 8388478^2 + 5633244^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 102100001119979 and 102100001120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100001120021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2552500027981 + ... + 2552500028020.

It is an arithmetic number, because the mean of its divisors is an integer number (17867500196007).

Almost surely, 2^{102100001120020} is an apocalyptic number.

102100001120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102100001120020 is an abundant number, since it is smaller than the sum of its proper divisors (112310001232064).

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

102100001120020 is a wasteful number, since it uses less digits than its factorization.

102100001120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5105000056010 (or 5105000056008 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 102100001120020 its reverse (20021100001201), we get a palindrome (122121101121221).

The spelling of 102100001120020 in words is "one hundred two trillion, one hundred billion, one million, one hundred twenty thousand, twenty".