1000010100020 has 24 divisors (see below), whose sum is σ = 2100040328904. Its totient is φ = 400000398336.

The previous prime is 1000010100007. The next prime is 1000010100059. The reversal of 1000010100020 is 200010100001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 77415271696 + 922594828324 = 278236^2 + 960518^2 .

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 = 1000010099977 and 1000010100013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3567704 + ... + 3837776.

It is an arithmetic number, because the mean of its divisors is an integer number (87501680371).

Almost surely, 2^{1000010100020} is an apocalyptic number.

1000010100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000010100020 is an abundant number, since it is smaller than the sum of its proper divisors (1100030228884).

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

1000010100020 is a wasteful number, since it uses less digits than its factorization.

1000010100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455219 (or 455217 counting only the distinct ones).

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

Adding to 1000010100020 its reverse (200010100001), we get a palindrome (1200020200021).

The spelling of 1000010100020 in words is "one trillion, ten million, one hundred thousand, twenty".