1202100000020 has 12 divisors (see below), whose sum is σ = 2524410000084. Its totient is φ = 480840000000.

The previous prime is 1202099999999. The next prime is 1202100000071. The reversal of 1202100000020 is 200000012021.

It can be written as a sum of positive squares in 2 ways, for example, as 318567678724 + 883532321296 = 564418^2 + 939964^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1202099999953 and 1202100000007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30052499981 + ... + 30052500020.

It is an arithmetic number, because the mean of its divisors is an integer number (210367500007).

Almost surely, 2^{1202100000020} is an apocalyptic number.

1202100000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202100000020 is an abundant number, since it is smaller than the sum of its proper divisors (1322310000064).

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

1202100000020 is a wasteful number, since it uses less digits than its factorization.

1202100000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60105000010 (or 60105000008 counting only the distinct ones).

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

Adding to 1202100000020 its reverse (200000012021), we get a palindrome (1402100012041).

The spelling of 1202100000020 in words is "one trillion, two hundred two billion, one hundred million, twenty", and thus it is an aban number.