202421213344 has 48 divisors (see below), whose sum is σ = 455682157056. Its totient is φ = 86707296000.

The previous prime is 202421213339. The next prime is 202421213347. The reversal of 202421213344 is 443312124202.

It is a super-2 number, since 2×202421213344² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (202421213347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205434 + ... + 668614.

It is an arithmetic number, because the mean of its divisors is an integer number (9493378272).

Almost surely, 2^202421213344 is an apocalyptic number.

It is an amenable number.

202421213344 is an abundant number, since it is smaller than the sum of its proper divisors (253260943712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202421213344 is a wasteful number, since it uses less digits than its factorization.

202421213344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465149 (or 465141 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 202421213344 its reverse (443312124202), we get a palindrome (645733337546).

The spelling of 202421213344 in words is "two hundred two billion, four hundred twenty-one million, two hundred thirteen thousand, three hundred forty-four".