202104430021 has 16 divisors (see below), whose sum is σ = 218121934464. Its totient is φ = 186154645824.

The previous prime is 202104430001. The next prime is 202104430057. The reversal of 202104430021 is 120034401202.

It is a cyclic number.

It is not a de Polignac number, because 202104430021 - 2¹³ = 202104421829 is a prime.

It is a super-2 number, since 2×202104430021² (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 (202104430001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12618000 + ... + 12634006.

It is an arithmetic number, because the mean of its divisors is an integer number (13632620904).

Almost surely, 2^202104430021 is an apocalyptic number.

It is an amenable number.

202104430021 is a deficient number, since it is larger than the sum of its proper divisors (16017504443).

202104430021 is a wasteful number, since it uses less digits than its factorization.

202104430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18060.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 202104430021 its reverse (120034401202), we get a palindrome (322138831223).

The spelling of 202104430021 in words is "two hundred two billion, one hundred four million, four hundred thirty thousand, twenty-one".