202104133421 has 4 divisors (see below), whose sum is σ = 209073241500. Its totient is φ = 195135025344.

The previous prime is 202104133411. The next prime is 202104133423. The reversal of 202104133421 is 124331401202.

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 73230313321 + 128873820100 = 270611^2 + 358990^2 .

It is a cyclic number.

It is not a de Polignac number, because 202104133421 - 2¹⁴ = 202104117037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202104133423) 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, 3484553996 + ... + 3484554053.

It is an arithmetic number, because the mean of its divisors is an integer number (52268310375).

Almost surely, 2^202104133421 is an apocalyptic number.

It is an amenable number.

202104133421 is a deficient number, since it is larger than the sum of its proper divisors (6969108079).

202104133421 is an equidigital number, since it uses as much as digits as its factorization.

202104133421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6969108078.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 202104133421 its reverse (124331401202), we get a palindrome (326435534623).

The spelling of 202104133421 in words is "two hundred two billion, one hundred four million, one hundred thirty-three thousand, four hundred twenty-one".