202103132421 has 32 divisors (see below), whose sum is σ = 283396495360. Its totient is φ = 127996412544.

The previous prime is 202103132381. The next prime is 202103132423. The reversal of 202103132421 is 124231301202.

It is not a de Polignac number, because 202103132421 - 2¹⁰ = 202103131397 is a prime.

It is a super-2 number, since 2×202103132421² (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 (202103132423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 534801 + ... + 830793.

It is an arithmetic number, because the mean of its divisors is an integer number (8856140480).

Almost surely, 2^202103132421 is an apocalyptic number.

It is an amenable number.

202103132421 is a deficient number, since it is larger than the sum of its proper divisors (81293362939).

202103132421 is a wasteful number, since it uses less digits than its factorization.

202103132421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296185.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 202103132421 its reverse (124231301202), we get a palindrome (326334433623).

The spelling of 202103132421 in words is "two hundred two billion, one hundred three million, one hundred thirty-two thousand, four hundred twenty-one".