202104201421 has 4 divisors (see below), whose sum is σ = 202613280412. Its totient is φ = 201595122432.

The previous prime is 202104201419. The next prime is 202104201469. The reversal of 202104201421 is 124102401202.

202104201421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 170725976100 + 31378225321 = 413190^2 + 177139^2 .

It is a cyclic number.

It is not a de Polignac number, because 202104201421 - 2¹ = 202104201419 is a prime.

It is a super-2 number, since 2×202104201421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202104201521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254538900 + ... + 254539693.

It is an arithmetic number, because the mean of its divisors is an integer number (50653320103).

Almost surely, 2^202104201421 is an apocalyptic number.

It is an amenable number.

202104201421 is a deficient number, since it is larger than the sum of its proper divisors (509078991).

202104201421 is an equidigital number, since it uses as much as digits as its factorization.

202104201421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509078990.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 202104201421 its reverse (124102401202), we get a palindrome (326206602623).

The spelling of 202104201421 in words is "two hundred two billion, one hundred four million, two hundred one thousand, four hundred twenty-one".