1000100001020 has 48 divisors (see below), whose sum is σ = 2232873034560. Its totient is φ = 375427193856.

The previous prime is 1000100001011. The next prime is 1000100001041. The reversal of 1000100001020 is 201000010001.

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 = 1000100000995 and 1000100001013.

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, 20486285 + ... + 20535044.

It is an arithmetic number, because the mean of its divisors is an integer number (46518188220).

Almost surely, 2^{1000100001020} is an apocalyptic number.

1000100001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000100001020 is an abundant number, since it is smaller than the sum of its proper divisors (1232773033540).

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

1000100001020 is a wasteful number, since it uses less digits than its factorization.

1000100001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41021414 (or 41021412 counting only the distinct ones).

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

Adding to 1000100001020 its reverse (201000010001), we get a palindrome (1201100011021).

The spelling of 1000100001020 in words is "one trillion, one hundred million, one thousand, twenty".