202130444421 has 24 divisors (see below), whose sum is σ = 296514143640. Its totient is φ = 132667577856.

The previous prime is 202130444407. The next prime is 202130444437. The reversal of 202130444421 is 124444031202.

202130444421 is a `hidden beast` number, since 2 + 0 + 213 + 0 + 4 + 4 + 442 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2873025 + 202127571396 = 1695^2 + 449586^2 .

It is not a de Polignac number, because 202130444421 - 2¹⁵ = 202130411653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202130444491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354886 + ... + 728151.

It is an arithmetic number, because the mean of its divisors is an integer number (12354755985).

Almost surely, 2^202130444421 is an apocalyptic number.

It is an amenable number.

202130444421 is a deficient number, since it is larger than the sum of its proper divisors (94383699219).

202130444421 is a wasteful number, since it uses less digits than its factorization.

202130444421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083365 (or 1083362 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 202130444421 its reverse (124444031202), we get a palindrome (326574475623).

The spelling of 202130444421 in words is "two hundred two billion, one hundred thirty million, four hundred forty-four thousand, four hundred twenty-one".