100010001020 has 48 divisors (see below), whose sum is σ = 212995923840. Its totient is φ = 39438856704.

The previous prime is 100010001001. The next prime is 100010001059. The reversal of 100010001020 is 20100010001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 100010000995 and 100010001013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1022912 + ... + 1116408.

It is an arithmetic number, because the mean of its divisors is an integer number (4437415080).

Almost surely, 2^100010001020 is an apocalyptic number.

100010001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100010001020 is an abundant number, since it is smaller than the sum of its proper divisors (112985922820).

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

100010001020 is a wasteful number, since it uses less digits than its factorization.

100010001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94262 (or 94260 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 100010001020 its reverse (20100010001), we get a palindrome (120110011021).

The spelling of 100010001020 in words is "one hundred billion, ten million, one thousand, twenty".