202121131424 has 24 divisors (see below), whose sum is σ = 397949465088. Its totient is φ = 101054600640.

The previous prime is 202121131393. The next prime is 202121131483. The reversal of 202121131424 is 424131121202.

It is a self number, because there is not a number n which added to its sum of digits gives 202121131424.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391799 + ... + 746825.

It is an arithmetic number, because the mean of its divisors is an integer number (16581227712).

Almost surely, 2^202121131424 is an apocalyptic number.

It is an amenable number.

202121131424 is a deficient number, since it is larger than the sum of its proper divisors (195828333664).

202121131424 is a wasteful number, since it uses less digits than its factorization.

202121131424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372828 (or 372820 counting only the distinct ones).

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

Adding to 202121131424 its reverse (424131121202), we get a palindrome (626252252626).

The spelling of 202121131424 in words is "two hundred two billion, one hundred twenty-one million, one hundred thirty-one thousand, four hundred twenty-four".