202121212430 has 32 divisors (see below), whose sum is σ = 365562141120. Its totient is φ = 80461370880.

The previous prime is 202121212421. The next prime is 202121212471. The reversal of 202121212430 is 34212121202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3846776 + ... + 3898964.

It is an arithmetic number, because the mean of its divisors is an integer number (11423816910).

Almost surely, 2^202121212430 is an apocalyptic number.

202121212430 is a deficient number, since it is larger than the sum of its proper divisors (163440928690).

202121212430 is a wasteful number, since it uses less digits than its factorization.

202121212430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54044.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 202121212430 its reverse (34212121202), we get a palindrome (236333333632).

The spelling of 202121212430 in words is "two hundred two billion, one hundred twenty-one million, two hundred twelve thousand, four hundred thirty".