202121124413 has 16 divisors (see below), whose sum is σ = 221856289200. Its totient is φ = 182986712064.

The previous prime is 202121124409. The next prime is 202121124433. The reversal of 202121124413 is 314421121202.

It can be written as a sum of positive squares in 8 ways, for example, as 11883834169 + 190237290244 = 109013^2 + 436162^2 .

It is not a de Polignac number, because 202121124413 - 2² = 202121124409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121124433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1900163 + ... + 2003711.

It is an arithmetic number, because the mean of its divisors is an integer number (13866018075).

Almost surely, 2^202121124413 is an apocalyptic number.

It is an amenable number.

202121124413 is a deficient number, since it is larger than the sum of its proper divisors (19735164787).

202121124413 is a wasteful number, since it uses less digits than its factorization.

202121124413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106448.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 202121124413 its reverse (314421121202), we get a palindrome (516542245615).

The spelling of 202121124413 in words is "two hundred two billion, one hundred twenty-one million, one hundred twenty-four thousand, four hundred thirteen".