1001020002100 has 18 divisors (see below), whose sum is σ = 2172213404774. Its totient is φ = 400408000800.

The previous prime is 1001020002097. The next prime is 1001020002167. The reversal of 1001020002100 is 12000201001.

It can be written as a sum of positive squares in 3 ways, for example, as 14148626704 + 986871375396 = 118948^2 + 993414^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5005099911 + ... + 5005100110.

Almost surely, 2^{1001020002100} is an apocalyptic number.

1001020002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001020002100 is an abundant number, since it is smaller than the sum of its proper divisors (1171193402674).

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

1001020002100 is a wasteful number, since it uses less digits than its factorization.

1001020002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010200035 (or 10010200028 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 1001020002100 its reverse (12000201001), we get a palindrome (1013020203101).

The spelling of 1001020002100 in words is "one trillion, one billion, twenty million, two thousand, one hundred".