2100204233021 has 4 divisors (see below), whose sum is σ = 2110865168412. Its totient is φ = 2089543297632.

The previous prime is 2100204232961. The next prime is 2100204233069. The reversal of 2100204233021 is 1203324020012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1204976025796 + 895228207225 = 1097714^2 + 946165^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100204233021 - 2¹⁰ = 2100204231997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100204232984 and 2100204233002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100204233521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5330467400 + ... + 5330467793.

It is an arithmetic number, because the mean of its divisors is an integer number (527716292103).

Almost surely, 2^{2100204233021} is an apocalyptic number.

It is an amenable number.

2100204233021 is a deficient number, since it is larger than the sum of its proper divisors (10660935391).

2100204233021 is a wasteful number, since it uses less digits than its factorization.

2100204233021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10660935390.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 2100204233021 its reverse (1203324020012), we get a palindrome (3303528253033).

The spelling of 2100204233021 in words is "two trillion, one hundred billion, two hundred four million, two hundred thirty-three thousand, twenty-one".