202121234 has 8 divisors (see below), whose sum is σ = 346493568. Its totient is φ = 86623380.

The previous prime is 202121233. The next prime is 202121237. The reversal of 202121234 is 432121202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (202121233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7218602 + ... + 7218629.

It is an arithmetic number, because the mean of its divisors is an integer number (43311696).

Almost surely, 2^202121234 is an apocalyptic number.

202121234 is a deficient number, since it is larger than the sum of its proper divisors (144372334).

202121234 is a wasteful number, since it uses less digits than its factorization.

202121234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14437240.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 202121234 is about 14216.9347610517. The cubic root of 202121234 is about 586.8637895750.

Adding to 202121234 its reverse (432121202), we get a palindrome (634242436).

The spelling of 202121234 in words is "two hundred two million, one hundred twenty-one thousand, two hundred thirty-four".